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Encyclopedia > Clinical depression

Depression
Classification & external resources
ICD-10 F32., F33.
ICD-9 296
OMIM 608516
DiseasesDB 3589
MedlinePlus 003213
eMedicine med/532 
On the Threshold of Eternity. In 1890, Vincent van Gogh painted this picture seen by some as symbolizing the despair and hopelessness felt in depression. Van Gogh himself suffered from depression and committed suicide later that same year.
On the Threshold of Eternity. In 1890, Vincent van Gogh painted this picture seen by some as symbolizing the despair and hopelessness felt in depression. Van Gogh himself suffered from depression and committed suicide later that same year.

Clinical depression (also called major-depressive disorder or unipolar depression) is a common psychiatric disorder, characterized by a pervasive low mood, loss of interest in usual activities and diminished ability to experience pleasure. The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The International Statistical Classification of Diseases and Related Health Problems 10th Revision (ICD-10) is a coding of diseases and signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or diseases, as classified by the World Health Organization (WHO). ... // F00-F99 - Mental and behavioural disorders (F00-F09) Organic, including symptomatic, mental disorders (F00) Dementia in Alzheimers disease (F01) Vascular dementia (F011) Multi-infarct dementia (F02) Dementia in other diseases classified elsewhere (F020) Dementia in Picks disease (F021) Dementia in Creutzfeldt-Jakob disease (F022) Dementia in Huntingtons... // F00-F99 - Mental and behavioural disorders (F00-F09) Organic, including symptomatic, mental disorders (F00) Dementia in Alzheimers disease (F01) Vascular dementia (F011) Multi-infarct dementia (F02) Dementia in other diseases classified elsewhere (F020) Dementia in Picks disease (F021) Dementia in Creutzfeldt-Jakob disease (F022) Dementia in Huntingtons... The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... The Mendelian Inheritance in Man project is a database that catalogues all the known diseases with a genetic component, and - when possible - links them to the relevant genes in the human genome. ... The Disease Bold textDatabase is a free website that provides information about the relationships between medical conditions, symptoms, and medications. ... MedlinePlus (medlineplus. ... eMedicine is an online clinical medical knowledge base that was founded in 1996. ... Image File history File links Download high resolution version (1256x1611, 212 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Clinical depression ... Image File history File links Download high resolution version (1256x1611, 212 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Clinical depression ... van Gogh redirects here. ... For other uses, see Suicide (disambiguation). ...


Although the term "depression" is commonly used to describe a temporary depressed mood when one "feels blue", clinical depression is a serious and often disabling condition that can significantly affect a person's work, family and school life, sleeping and eating habits, general health and ability to enjoy life.[1] The course of clinical depression varies widely: depression can be a once in a life-time event or have multiple recurrences, it can appear either gradually or suddenly, and either last for a few months or be a life-long disorder. Having depression is a major risk factor for suicide; in addition, people with depression suffer from higher mortality from other causes.[2] In everyday language depression refers to any downturn in mood, which may be relatively transitory and perhaps due to something trivial. ... For other uses, see Suicide (disambiguation). ...


Clinical depression may be isolated or be a secondary result of a primary condition such as bipolar disorder or chronic pain. When specific treatment is indicated, this is usually psychotherapy and/or antidepressants. For other uses, see Bipolar. ... Chronic pain was originally defined as pain that has lasted 6 months or longer. ... Psychotherapy is an interpersonal, relational intervention used by trained psychotherapists to aid clients in problems of living. ... Prozac, a selective serotonin reuptake inhibitor (SSRI) Serotonin-norepinephrine reuptake inhibitor, Venlafaxine An antidepressant is a psychiatric medication or other substance (nutrient or herb) used for alleviating depression or dysthymia (milder depression). ...

Contents

[edit] Signs and symptoms

Clinical depression can present with a variety of symptoms, however almost all patients display a marked change in mood, a deep feeling of sadness, and a noticeable loss of interest or pleasure in favorite activities. Other symptoms include: In psychology, anhedonia is a patients inability to experience pleasure from normally pleasurable life events such as eating, exercise, and social/sexual interactions. ...

  • Persistent sad, anxious or "empty" mood
  • Loss of appetite and/or weight loss or conversely overeating and weight gain
  • Insomnia, early-morning awakening, or oversleeping
  • Restlessness or irritability
  • Feelings of worthlessness, inappropriate guilt, helplessness
  • Feelings of hopelessness, pessimism
  • Difficulty thinking, concentrating, remembering or making decisions
  • Thoughts of death or suicide or attempts at suicide
  • Loss of interest or pleasure in hobbies and activities that were once enjoyed
  • Decreased energy, fatigue, feeling "slowed down" or sluggish
  • Persistent physical symptoms that do not respond to treatment, such as headaches, digestive disorders, and chronic pain

Not all patients will present every symptom, and the severity of symptoms will vary widely among individuals. Symptoms must, however, persist for at least two weeks before being considered a potential sign of depression, with the exception of suicidal thoughts or attempts.[3][1] This article is about the sleeping disorder. ... A headache (cephalgia in medical terminology) is a condition of pain in the head; sometimes neck or upper back pain may also be interpreted as a headache. ... Chronic pain was originally defined as pain that has lasted 6 months or longer. ...


Diagnosis of clinical depression in children is more difficult than in adults and is often left undiagnosed, and thus untreated, because the symptoms in children are often written off as normal childhood moodiness. Diagnosis is also made difficult because children are more likely than adults to show different symptoms depending on the situation.[4]


While some children still function reasonably well, most who are suffering depression will suffer from a noticeable change in their social activities and life, a loss of interest in school and poor academic performance, and possibly drastic changes in appearance. They may also begin abusing drugs and/or alcohol, particularly past the age of 12. Although much rarer than in adults, children with major depression may attempt suicide or have suicidal thoughts even before the age of twelve.[4]


[edit] Diagnosis

Before a diagnosis of depression is made, a physician should perform a complete medical exam to rule out any possible physical cause for the suspected depression. If no such cause is found, a psychological evaluation should be done by the physician or by referral to a psychiatrist or psychologist.[1] The evaluation will include a complete history of symptoms, a discussion of alcohol and drug use, and whether the patient has had or is having suicidal thoughts or thinking about death. The evaluation will also include a family medical history to see if other family members suffer from any form of depression or similar mood disorder.[1] For other uses, see Doctor. ... For other uses, see Psychiatrist (disambiguation). ... A psychologist is an expert in psychology, the systematic investigation of the human mind, including behavior, cognition, and affect. ... For other uses, see Death (disambiguation), Dead (disambiguation), or Death (band). ...


There are several criteria lists and diagnostic tools that can also aid in the diagnosis of depression. Most are based on the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV), which is a book published by the American Psychiatric Association that defines the criteria used to diagnose various mental disorders, including depression. The Diagnostic and Statistical Manual published by the American Psychiatric Association The Diagnostic and Statistical Manual of Mental Disorders (DSM) is a handbook for mental health professionals that lists different categories of mental disorder and the criteria for diagnosing them, according to the publishing organization the American Psychiatric Association. ... Due to the epidemic of medical errors, readers are cautioned to be aware that the American Psychiatric Association isnt immune to this. ...


The Beck Depression Inventory, originally created by Dr. Aaron T. Beck in 1961, is a 21-question patient completed survey that covers items related to the basic symptoms of depression, such as hopelessness and irritability, cognitions such as guilt or feelings of being punished, as well as physical symptoms such as fatigue, weight loss, and lack of interest in sex.[5] The Beck Inventory is one of the most widely used diagnostic tools for self-diagnosis of depression, although its primary purpose is not the diagnosis of depression, but determining the severity and presence of symptoms.[6] The Beck Depression Inventory (BDI, BDI-II), created by Dr. Aaron T. Beck, is a twenty-one question multiple choice self-report inventory that is one of the widely used instruments for measuring the severity of depression. ... A Self-report inventory is a type of psychological test in which a patient fills out a survey or questionaire with or without the help of a mental health professional. ... Self diagnosis is the process of diagnosing medical conditions in oneself. ...


There are also two Patient Health Questionnaires available that are also self-administered questionnaires. The PHQ-2 has only two questions that asks about the frequency of depressed mood and a loss of interest in doing things, with a positive to either question indicating the need for further testing.[7] The PHQ-9 is a slightly more detailed nine question survey covering some of the major symptoms of depression and the frequency a person has experienced them. It is based directly on the diagnostic criteria listed in the DSM-IV and often used as a follow up to a positive PHQ-2 test.[8]


[edit] Epidemiology

Clinical depression affects about 8–17% of the population on at least one occasion in their lives, before the age of 40. In some countries, such as Australia, one in four women and one in six men will suffer from depression. In Canada, major depression affects approximately 1.35 million people[citation needed], and in the USA approximately 14 million adults per year.[9] An estimated 121 million people worldwide currently suffer from depression.[10]


People who have had one episode of depression may be more than normally likely to have more episodes in the future, so the first time a young person becomes depressed is important both as a personal and public health concern.[citation needed]


About twice as many females as males report or receive treatment for clinical depression, though this imbalance is shrinking over the course of recent history; this difference seems to completely disappear after the age of 50–55. Clinical depression is currently the leading cause of disability in North America, and is expected to become the second leading cause of disability worldwide (after heart disease) by the year 2020, according to the World Health Organization.[11] Look up disability in Wiktionary, the free dictionary. ... Heart disease is an umbrella term for a number of different diseases which affect the heart and as of 2007 it is the leading cause of death in the United States,[1] and England and Wales. ... WHO redirects here. ...


Recent studies suggest that the diagnostic criteria for depression are far too broad, resulting in diagnosis of clinical depression in people who are not truly clinically depressed and who have shown normal responses to negative events.[12]


[edit] Types

The diagnostic category major depressive disorder appears in the Diagnostic and Statistical Manual of Mental Disorders of the American Psychiatric Association. The term is generally not used in countries which instead use the ICD-10 system, but the diagnosis of depressive episode is very similar to an episode of major depression. Clinical depression also usually refers to acute or chronic depression severe enough to need treatment. Minor depression is a less-used term for a subclinical depression that does not meet criteria for major depression but where there are at least two symptoms present for two weeks. The Diagnostic and Statistical Manual published by the American Psychiatric Association The Diagnostic and Statistical Manual of Mental Disorders (DSM) is a handbook for mental health professionals that lists different categories of mental disorder and the criteria for diagnosing them, according to the publishing organization the American Psychiatric Association. ... Due to the epidemic of medical errors, readers are cautioned to be aware that the American Psychiatric Association isnt immune to this. ... The International Statistical Classification of Diseases and Related Health Problems (commonly known by the abbreviation ICD) is a detailed description of known diseases and injuries. ...


[edit] Major depression

Major depression is a severely depressed mood that persists for at least two weeks. Episodes may be isolated or recurrent and categorized as mild, major or severe. If the patient has already had an episode of mania or markedly elevated mood, a diagnosis of bipolar disorder is usually made instead. Depression without periods of elation or mania is therefore sometimes referred to as unipolar depression because the mood remains at one emotional state or "pole". The diagnosis usually excludes cases where the symptoms are a normal result of bereavement (though it is possible for normal bereavement to turn into a depressive episode). This article is an expansion of a section entitled Mania from within the main article Bipolar disorder. ... Hypomania is a mood state characterized by persistent and pervasive elated or irritable mood, and thoughts and behaviors that are consistent with such a mood state. ... For other uses, see Bipolar. ... Sad redirects here; for the three letter acronym, see SAD. Suffering is any unwanted condition and the corresponding negative emotion. ...


Diagnosticians recognize several possible subtypes of major depression:

  • Depression with melancholic features – melancholia is characterized by a loss of pleasure (anhedonia) in most or all activities, a failure of reactivity to pleasurable stimuli, a quality of depressed mood more pronounced than that of grief or loss, a worsening of symptoms in the morning hours, early morning waking, psychomotor retardation, anorexia (excessive weight loss, not to be confused with Anorexia Nervosa), or excessive guilt.
  • Depression with Psychotic Features – Some people with major depressive or manic episodes may experience psychotic features. They may be presented with hallucinations or delusions that are either mood-congruent (content coincident with depressive themes) or non-mood-congruent (content not coincident with depressive themes). It is clinically more common to encounter a delusional system as an adjunct to depression than to encounter hallucinations, whether visual or auditory.

It is possible for a person to have a combination of these subtypes. For instance someone may experience loss of pleasure in activities as seen in melancholic depression in addition to over-eating and weight gain common to atypical depression. Melancholic Depression, or depression with melancholic features is a subtype of depression characterized by the inability to find pleasure in positive things combined with physical agitation, insomnia, or decreased appetite. ... For other uses, see Anorexia. ... Atypical Depression (AD) is a subtype of Dysthymia and Major Depression characterized by mood reactivity — being able to experience improved mood in response to positive events. ... This article or section should be merged with Birth control pill Weight Gain When Taking The Pill When starting to take the birth contol pill some people may expierence slight weight gain. ... Hypersomnia, also known as excessive daytime sleepiness (EDS), is excessive amount of sleepiness. ... Silent treatment redirects here. ... Psychotic depression is one of the most severe forms of the general depressive diseases in which the person experiences moments of delusional or paranoid being. ... A hallucination is a perception in the absence of a stimulus that the person may or may not believe is real. ... A delusion is commonly defined as a fixed false belief and is used in everyday language to describe a belief that is either false, fanciful or derived from deception. ...


[edit] Other disorders featuring depressed mood

  • Dysthymia is a chronic, mild depression in which a person suffers from a depressive mood almost daily over a span of at least two years without episodes of major depression. The symptoms are not as severe as those for major depression, although people with dysthymia are vulnerable to co-occurring episodes of major depression (sometimes referred to as "double depression").[citation needed]
  • Bipolar disorder is an episodic illness characterized by alternating states of mania, hypomania and depression. In the United States, bipolar disorder was previously called "manic depression", however this term is no longer favored by the medical community.
  • Postnatal depression or postpartum depression is a form of clinical depression that occurs after childbirth. Postnatal depression primarily occurs in women, less commonly in men, with similar symptoms and treatment methods as clinical depression, however postnatal depression generally lasts only a few weeks with proper diagnosis and treatment.
  • Recurrent brief depression (RBD) is distinguished from clinical depression primarily by differences in duration. Patients with RBD have depressive episodes about once per month, with individual episodes lasting less than two weeks and typically less than 2–3 days. Diagnosis of RBD requires that the episodes occur over the span of at least one year and, in female patients, independently of the menstrual cycle. People with clinical depression can develop RBD, and vice versa, with both illnesses having similar risks.[15]

Dysthymia is a mood disorder that falls within the depression spectrum. ... For other uses, see Bipolar. ... This article is an expansion of a section entitled Mania from within the main article Bipolar disorder. ... Hypomania is a mood state characterized by persistent and pervasive elated or irritable mood, and thoughts and behaviors that are consistent with such a mood state. ... Postnatal Depression (also called Postpartum Depression and referred throughout this article by the acronym PPD) is a form of clinical depression which can affect women, and less frequently men, after childbirth. ... Menstrual cycle In the female reproductive system, the menstrual cycle is a recurring cycle of physiologic changes that occurs in reproductive age females of several mammals, including human beings and other apes. ...

[edit] Overlapping psychological features

[edit] Anxiety

The different types of depression and anxiety are classified separately by the DSM-IV-TR, with the exception of hypomania, which is included in the bipolar disorder category. Despite the different categories, depression and anxiety can indeed be co-occurring (occurring together), independently (without mood congruence), or comorbid (occurring together, with overlapping symptoms, and with mood congruence). In an effort to bridge the gap between the DSM-IV-TR categories and what clinicians actually encounter, experts such as Herman Van Praag of Maastricht University have proposed ideas such as anxiety/aggression-driven depression.[16] This idea refers to an anxiety/depression spectrum for these two disorders, which differs from the mainstream perspective of discrete diagnostic categories. Anxiety is a physiological state characterized by cognitive, somatic, emotional, and behavioral components (Seligman, Walker & Rosenhan, 2001). ... Mood congruence is a psychiatric term that refers to the congruence between feeling, or the emotion that a person is experiencing, and affect, or the manner in which that emotion is presenting, or being expressed. ... In medicine and in psychiatry, comorbidity refers to: The presence of one or more disorders (or diseases) in addition to a primary disease or disorder. ... The Diagnostic and Statistical Manual of Mental Disorders, published by the American Psychiatric Association, is the handbook used most often in diagnosing mental disorders in the United States and other countries. ... Universiteit Maastricht (Maastricht University), founded in 1976, is the second youngest university in the Netherlands. ...


Although there is no specific diagnostic category for the comorbidity of depression and anxiety in the DSM or ICD, the National Comorbidity Survey (US) reports that 58 percent of those with major depression also suffer from lifetime anxiety. Supporting this finding, two widely accepted clinical colloquialisms include

  • Agitated depression - a state of depression that presents as anxiety and includes akathisia (heightened restlessness), suicide, insomnia (not early morning wakefulness), nonclinical (meaning "doesn't meet the standard for formal diagnosis") and nonspecific panic, and a general sense of dread.
  • Akathitic depression - a state of depression that presents as anxiety or suicidality and includes akathisia but does not include symptoms of panic. Some consider it a form of mixed state.

It is also clear that even mild anxiety symptoms can have a major impact on the course of a depressive illness, and the commingling of any anxiety symptoms with the primary depression is important to consider. A pilot study by Ellen Frank et al., at the University of Pittsburgh, found that depressed or bipolar patients with lifetime panic symptoms experienced significant delays in their remission.[citation needed] These patients also had higher levels of residual impairment, or the ability to get back into the swing of things. On a similar note, Robert Sapolsky of Stanford University and others also argue that the relationship between stress, anxiety, and depression could be measured and demonstrated biologically.[17] To that point, a[18] study by Heim and Nemeroff et al., of Emory University, found that depressed and anxious women with a history of childhood abuse recorded higher heart rates and the stress hormone ACTH when subjected to stressful situations. Akathisia (or acathisia) is an often extremely unpleasant subjective sensation of inner restlessness that manifests itself with an inability to sit still or remain motionless, hence the origin of its name: Greek a (without) + kathesis (sitting). ... Akathisia (or acathisia) is an often extremely unpleasant subjective sensation of inner restlessness that manifests itself with an inability to sit still or remain motionless, hence the origin of its name: Greek a (without) + kathesis (sitting). ... In the context of mental illness, a mixed state (also known as dysphoric mania or agitated depression) is a condition during which symptoms of mania and depression occur simultaneously (e. ... The University of Pittsburgh, commonly referred to as Pitt, is a state-related, doctoral/research university in Pittsburgh, Pennsylvania, United States. ... Robert Maurice Sapolsky (b. ... Stanford redirects here. ... The word Heim is the German equivalent of the English word home. ... Emory University is a private university located in the metropolitan area of the city of Atlanta and in western unincorporated DeKalb County, Georgia, United States. ... Adrenocorticotropic hormone (ACTH or corticotropin) is a polypeptide hormone secreted from corticotropes in the anterior lobe of the pituitary gland in response to corticotropin-releasing hormone (CRH) released by the hypothalamus. ...


[edit] Hypomania

Hypomania, as the name suggests, is a state of mind or behavior that is "below" (hypo) mania. In other words, a person in a hypomanic state often displays behavior that has all the hallmarks of a full-blown mania (e.g., marked elevation of mood that is characterized by euphoria, overactivity, disinhibition, impulsivity, a decreased need for sleep, hypersexuality), but these symptoms, though disruptive and seemingly out of character, are not so pronounced as to be considered a diagnosably manic episode. In a psychiatric context, it is important to identify the possible presence and characteristics of manic and hypomanic episodes, since these may lead to a diagnosis of bipolar disorder, which is medically treated differently from depression. Hypomania is a mood state characterized by persistent and pervasive elated or irritable mood, and thoughts and behaviors that are consistent with such a mood state. ... For other uses, see Bipolar. ...


Another important point is that hypomania is a diagnostic category that includes both anxiety and depression. It often presents as a state of anxiety that occurs in the context of a clinical depression. Patients in a hypomanic state often describe a sense of extreme generalized or specific anxiety, recurring panic attacks, night terrors, guilt, and agency (as it pertains to codependence and counterdependence). All of this happens while they are in a state of retarded or somnolent depression. This is the type of depression in which a person is lethargic and unable to move through life. The terms retarded and somnolent are shorthand for states of depression that include lethargy, hypersomnia, a lack of motivation, a collapse of ADLs (activities of daily living), and social withdrawal. This is similar to the shorthand used to describe an "agitated" or "akathitic" depression. Agency considered in the philosophical sense is the capacity of an agent to act in a world. ... Codependence (or codependency) is a popular psychology concept popularized by Twelve-Step program advocates. ... Hypersomnia, also known as excessive daytime sleepiness (EDS), is excessive amount of sleepiness. ... Akathisia (or acathisia) is an often extremely unpleasant subjective sensation of inner restlessness that manifests itself with an inability to sit still or remain motionless, hence the origin of its name: Greek a (without) + kathesis (sitting). ...


In considering the hypomania-depression connection, a distinction should be made between anxiety, panic, and stress. Anxiety is a physiological state that is caused by the sympathetic nervous system. Anxiety does not need an outside influence to occur. Panic is related to the "fight or flight" mechanism. It is a reaction, induced by an outside stimulus, and is a product of the sympathetic nervous system and the cerebral cortex. More plainly, panic is an anxiety state that we are thinking about. Finally, stress is a psychosocial reaction, influenced by how a person filters nonthreatening external events. This filtering is based on one's own ideas, assumptions, and expectations. Panic is the primal urge to run and hide in the face of imminent danger. ... In medical terms, stress is the disruption of homeostasis through physical or psychological stimuli. ... The Sympathetic Nervous System (SNS) is a branch of the autonomic nervous system. ... This article or section should include material from Fight-or-flight The flight or fight response, also called the acute stress response, was first described by Walter Cannon in the 1920s as a theory that animals react to threats with a general discharge of the sympathetic nervous system. ... The Sympathetic Nervous System (SNS) is a branch of the autonomic nervous system. ... For other uses, see Cortex. ... Psychosocial refers to ones psychological development in the context of a social environment. ...


[edit] Causes

Current theories regarding the risk factors and causes of clinical depression can be broadly classified into two categories, Physiological and Sociopsychological:


[edit] Physiological

[edit] Genetic predisposition

The tendency to develop depression may be inherited: according to the National Institute of Mental Health[19] there is some evidence that depression may run in families. Most experts believe that both biological and psychological factors play a role. The National Institute of Mental Health (NIMH) is part of the federal government of the United States and the largest research organization in the world specializing in mental illness. ...

Brain chemicals called neurotransmitters allow electrical signals to move from the axon of one nerve cell to the neuron of another. A shortage of neurotransmitters impairs brain communication.
Brain chemicals called neurotransmitters allow electrical signals to move from the axon of one nerve cell to the neuron of another. A shortage of neurotransmitters impairs brain communication.

synapse diagram: cells communicate by electrical messages passed from the axon of one nerve cell to the neuron of another. ... synapse diagram: cells communicate by electrical messages passed from the axon of one nerve cell to the neuron of another. ...

[edit] Neurological

Many modern antidepressant drugs change levels of certain neurotransmitters, namely serotonin and norepinephrine (noradrenaline). However, the relationship between serotonin, SSRIs, and depression is typically greatly oversimplified when presented to the public, though this may be due to the lack of scientific knowledge regarding the mechanisms of action.[20] Evidence has shown the involvement of neurogenesis in depression, though the role is not exactly known.[21] Recent research has suggested that there may be a link between depression and neurogenesis of the hippocampus.[22] This horseshoe-shaped structure is a center for both mood and memory. Loss of neurons in the hippocampus is found in depression and correlates with impaired memory and dysthymic mood. The most widely accepted explanation for this is that the drugs increase serotonin levels in the brain which in turn stimulate neurogenesis and therefore increase the total mass of the hippocampus and would in theory restore mood and memory, therefore assisting in the fight against the mood disorder. However, whether environmental confounds could contribute to this remains a subject of controversy.[citation needed] Prozac, a selective serotonin reuptake inhibitor (SSRI) Serotonin-norepinephrine reuptake inhibitor, Venlafaxine An antidepressant is a psychiatric medication or other substance (nutrient or herb) used for alleviating depression or dysthymia (milder depression). ... An assortment of psychoactive drugs A psychoactive drug or psychotropic substance is a chemical substance that acts primarily upon the central nervous system where it alters brain function, resulting in temporary changes in perception, mood, consciousness and behavior. ... Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a presynaptic and a postsynaptic neuron. ... For the professional wrestling stable, see Ravens Nest#Serotonin. ... Norepinephrine (INN)(abbr. ... SSRI redirects here; for other uses, see SSRI (disambiguation). ... Neurogenesis (birth of neurons) is the process by which neurons are created. ... For other uses, see Hippocampus (disambiguation). ...


In about one-third of individuals diagnosed with attention-deficit hyperactivity disorder (ADHD), a disorder widely believed to be neurological and developmental, depression is recognized as comorbid.[23] Dysthymia, a form of chronic, low-level depression, is particularly common in adults with undiagnosed ADHD who have encountered years of frustrating ADHD-related problems with education, employment, and interpersonal relationships.[24] Attention-Deficit Hyperactivity Disorder (ADHD), is a neurobehavioural developmental disorder[1] [2] [3] affecting about 3-5% of the worlds population under the age of 19[4]. It typically presents itself during childhood, and is characterized by a persistent pattern of inattention and/or hyperactivity, as well as forgetfulness... In medicine and in psychiatry, comorbidity refers to: The presence of one or more disorders (or diseases) in addition to a primary disease or disorder. ... Dysthymia is a mood disorder that falls within the depression spectrum. ...


New evidence shows that individuals with clinical depression exhibit markedly higher levels of monoamine oxidase A (MAO-A) in the brain compared to people without depression.[25] MAO-A is an enzyme which reacts with and decreases the concentration of monoamines such as serotonin, norephinephrine and dopamine. Lower concentrations of monoamines is a well known cause of depression.[26] Monoamine oxidase A is an isozyme of monoamine oxidase. ... Ribbon diagram of the enzyme TIM, surrounded by the space-filling model of the protein. ... In biochemistry, monoamines are a group of organic compounds containing only one amino group. ...


[edit] Medical conditions

Certain illnesses, including cardiovascular disease,[27] hepatitis, mononucleosis, hypothyroidism, fructose malabsorption,[28] sleep apnea, and organic brain damage caused by degenerative conditions such as Parkinson disease, Multiple Sclerosis or by traumatic blunt force injury may contribute to depression, as may certain prescription drugs such as hormonal contraception methods and steroids. Depression also occurs in patients with chronic pain, such as chronic back pain, much more frequently than in the general population. Fibromyalgia Syndrome sufferers also experience depression and anxiety. Dampness or mold in the home is associated with depression,[29] as is the frequent use of aerosols and air fresheners in the home.[30] Cardiovascular disease refers to the class of diseases that involve the heart or blood vessels (arteries and veins). ... Hepatitis (plural hepatitides) implies injury to liver characterised by presence of inflammatory cells in the liver tissue. ... Infectious mononucleosis (also known as mono, the kissing disease, Pfeiffers disease, and, in British English, glandular fever) is a disease seen most commonly in adolescents and young adults, characterized by fever, sore throat and fatigue. ... This article or section does not cite its references or sources. ... Fructose malabsorption is a condition in which the fructose carrier in enterocytes is deficient. ... Sleep apnea, sleep apnoea or sleep apnœa is a sleep disorder characterized by pauses in breathing during sleep. ... Parkinsons disease (PD; paralysis agitans) is a neurodegenerative disease of the substantia nigra (an area in the basal ganglia). ... Multiple sclerosis (abbreviated MS, also known as disseminated sclerosis or encephalomyelitis disseminata) is a chronic, inflammatory, demyelinating disease that affects the central nervous system (CNS). ... Hormonal contraception refers to birth control methods that act on the hormonal system. ... This article is about the chemical family of steroids. ... Look up Pain in Wiktionary, the free dictionary. ... Back pain (also known dorsalgia) is pain felt in the back that may originate from the muscles, nerves, bones, joints or other structures in the spine. ...


[edit] Dietary

The increase in depression in industrialised societies has been linked to diet, particularly to reduced levels of omega-3 fatty acids in intensively farmed food and processed foods.[citation needed] In nutrition, the diet is the sum of food consumed by a person or other organism. ... Omega-3 fatty acids are polyunsaturated fatty acids found in certain fish tissues, and in vegetable sources such as flax seeds, walnuts, and canola oil. ... In chemistry, especially biochemistry, a fatty acid is a carboxylic acid (or organic acid), often with a long aliphatic tail (long chains), either saturated or unsaturated. ... Intensive farming or intensive agriculture is an agricultural production system characterized by the high inputs of capital or labour relative to land area. ...


[edit] Sleep quality

Poor sleep quality co-occurs with major depression. Major depression leads to alterations in the function of the hypothalamus and pituitary causing excessive release of cortisol which can lead to poor sleep quality. Individuals suffering from major depression have been found to have an abnormal sleep architecture, often entering REM sleep sooner than usual, along with highly emotionally-charged dreaming. Antidepressant drugs, which often function as REM sleep suppressants, may serve to dampen abnormal REM activity and thus allow for a more restorative sleep to occur. Cortisol is a corticosteroid hormone produced by the Zona fasciculata of the adrenal cortex (in the adrenal gland). ... Rapid eye movement (REM) is the stage of sleep during which the most vivid (though not all) dreams occur. ... Prozac, a selective serotonin reuptake inhibitor (SSRI) Serotonin-norepinephrine reuptake inhibitor, Venlafaxine An antidepressant is a psychiatric medication or other substance (nutrient or herb) used for alleviating depression or dysthymia (milder depression). ...


[edit] Seasonal affective disorder

Seasonal affective disorder (SAD) is a type of depressive disorder that occurs in the winter when daylight hours are short. It is believed that the body's production of melatonin, which is produced at higher levels in the dark, plays a major part in the onset of SAD and that many sufferers respond well to bright light therapy, also known as phototherapy.[citation needed] Light therapy lamp for Seasonal Affective Disorder Seasonal affective disorder, also known as winter depression, is an affective, or mood, disorder. ... Melatonin, 5-methoxy-N-acetyltryptamine, is a hormone found in all living creatures from algae[1] to humans, at levels that vary in a diurnal cycle. ... Light therapy or phototherapy consists of exposure to specific ranges of light wavelengths (using lasers or LEDs), or very bright, full-spectrum light, for a prescribed amount of time. ...


[edit] Postpartum depression

Postpartum depression refers to the intense, sustained and sometimes disabling depression experienced by women after giving birth. Postpartum depression, which has incidence rate of 10-15%, typically sets in within three months of labor and can last for as long as three months.[31] About two new mothers out of a thousand experience the more serious depressive disorder Postnatal Psychosis which includes hallucinations and/or delusions. Postpartum depression (also postnatal depression) is a form of clinical depression which can affect women, and less frequently men, after childbirth. ... For other uses, see Psychosis (disambiguation). ...


[edit] Sociological

[edit] Psychological factors

Low self-esteem and self-defeating or distorted thinking are connected with depression. However, it has been proposed that it is the result of depression and not necessarily the cause of it. This is still debated in the scientific community. Although it is not clear which is the cause and which is the effect, it is known that depressed persons who are able to make corrections in their thinking patterns can show improved mood and self-esteem (Cognitive Behavioral Therapy).[citation needed] Psychological factors related to depression include the complex development of one's personality and how one has learned to cope with external environmental factors such as stress.[citation needed] In psychology, self-esteem or self-worth is a persons self-image at an emotional level; circumventing reason and logic. ... In psychology, self-esteem or self-worth is a persons self-image at an emotional level; circumventing reason and logic. ... A Cognitive Behavioral Therapy (CBT) is a psychotherapy based on modifying cognitions, assumptions, beliefs and behaviors, with the aim of influencing disturbed emotions. ... Psychological science redirects here. ... In medical terms, stress is the disruption of homeostasis through physical or psychological stimuli. ...


[edit] Early experiences

Events such as the death of a parent, issues with biological development, school related problems, abandonment or rejection, neglect, chronic illness, and physical, psychological, or sexual abuse can also increase the likelihood of depression later in life. Post-traumatic stress disorder (PTSD) includes depression as one of its major symptoms.[citation needed] Child abandonment is the practice of abandoning offspring outside of legal adoption. ... This page is a candidate to be moved to Wiktionary. ... Abuser redirects here. ... Post-traumatic stress disorder (PTSD) is a term for certain severe psychological consequences of exposure to, or confrontation with, stressful events that the person experiences as highly traumatic. ...


[edit] Life experiences

The following experiences or circumstances may trigger depression:

Divorce or dissolution of marriage is the ending of a marriage before the death of either spouse. ... A boy from an East Cipinang trash dump slum in Jakarta, Indonesia shows what he found. ... Compulsive gambling is an urge or addiction to gamble despite harmful negative consequences or a desire to stop. ... Eating disorders are a group of mental disorders that interfere with normal food consumption. ... It has been suggested that Anticipatory Grief be merged into this article or section. ... CIA figures for world unemployment rates, 2006 Unemployment is the state in which a person is without work, available to work, and is currently seeking work. ... For other uses, see Faith (disambiguation). ... Psychological trauma is a type of damage to the psyche that occurs as a result of a traumatic event. ... Sexual dysfunction or sexual malfunction (see also sexual function) is difficulty during any stage of the sexual act (which includes desire, arousal, orgasm, and resolution) that prevents the individual or couple from enjoying sexual activity. ...

[edit] Treatment and services

The treatment of depression is highly individualized to the patient, based on the patient's unique combination of biological, psychological and social health factors and the severity of their condition.[33] The three most conventional treatments for depression include medication, psychotherapy, and Electroconvulsive therapy, however new treatments and less conventional options are also available, including self help, life style changes, and vagus nerve stimulation.[33]


If there is an imminent threat of suicide or the patient is a danger to others, hospitalization is employed as an intervention method to keep at-risk individuals safe until they cease to be a danger to themselves or others. At-risk individuals may also be placed in a partial hospitalization therapy, in which the patient sleeps at home but spends most of the day in a psychiatric hospital setting. This intensive treatment usually involves group therapy, individual therapy, medication management, and is used often in the case of children and adolescents. For other uses, see Suicide (disambiguation). ... Partial hospitalization is a type of treatment program used in treatment of mental illness and substance abuse. ... Group therapy is a form of psychotherapy during which one or several therapists treat a small group of clients together as a group. ... Psychotherapy is an interpersonal, relational intervention used by trained psychotherapists to aid clients in problems of living. ... Psychopharmacology is the study of the effects of any psychoactive drug that acts upon the mind by affecting brain chemistry. ...


[edit] Drug therapy

Sufferers of severe depression may benefit from the use of antidepressant drugs. A widely-reported meta-analysis combined 35 clinical trials submitted to the FDA before licensing of four newer antidepressants. The authors found that although the antidepressants were statistically superior to placebo they often did not exceed the NICE criteria for a 'clinically significant' effect. In particular they found that the effect size was very small for moderate depression but increased with severity reaching 'clinical significance' for very severe depression.[34] This result is consistent with the earlier clinical studies where only patients with severe depression benefited from the treatment with a tricyclic antidepressant imipramine or from psychotherapy more than from the placebo treatment.[35][36][37] Selective serotonin reuptake inhibitors, such as citalopram (Celexa), fluoxetine (Prozac), paroxetine (Paxil), and sertraline (Zoloft), are the primary medications considered for patients, having fewer side effects than the older monoamine oxidase inhibitors (MAOIs). MAOIs may be the best medication for a small number of patients, however those patients will have to avoid a variety of foods and decongestant medications to reduce the chances of a hypertensive crisis.[1] Bupropion (Wellbutrin, Zyban), an atypical antidepressant that acts as a norepinephrine and dopamine reuptake inhibitor, is also considered to be effective in the treatment of depression,[38] without sexual dysfunction or sexual side effects[39] and without weight gain. Bupropion has also been shown to be more effective than SSRIs at improving symptoms such as hypersomnia and fatigue in depressed patients.[40] Prozac, a selective serotonin reuptake inhibitor (SSRI) Serotonin-norepinephrine reuptake inhibitor, Venlafaxine An antidepressant is a psychiatric medication or other substance (nutrient or herb) used for alleviating depression or dysthymia (milder depression). ... The United States Food and Drug Administration is the government agency responsible for regulating food, dietary supplements, drugs, cosmetics, medical devices, biologics and blood products in the United States. ... For Wikipedia statistics, see m:Statistics Statistics is the science and practice of developing human knowledge through the use of empirical data expressed in quantitative form. ... For other uses, see Placebo (disambiguation). ... Time Zone CET (GMT +1) Coordinates Administration Country Region Provence-Alpes-Côte dAzur Department Alpes-Maritimes (06) Intercommunality Community of Agglomeration Nice Côte dAzur Mayor Jacques Peyrat (UMP) (since 1995) Statistics Land area¹ 71. ... This article does not cite any references or sources. ... SSRI redirects here; for other uses, see SSRI (disambiguation). ... Citalopram is an antidepressant drug used to treat depression associated with mood disorders. ... Prozac redirects here. ... Paroxetine (Paxil, Seroxat, Pexeva) is a selective serotonin reuptake inhibitor (SSRI) antidepressant. ... Zoloft bottles, with blue and green tablets Sertraline hydrochloride (also sold under brand names Zoloft, Lustral, Apo-Sertral, Asentra, Gladem, Serlift, Stimuloton, Xydep, Serlain, Concorz) is an antidepressant of the selective serotonin reuptake inhibitor (SSRI) class. ... MAOI redirects here. ... A decongestant is a broad class of drugs designed to symptomatically treat ailments affecting the respiratory system. ... A hypertensive emergency is severe hypertension with acute impairment of an organ system (especially the central nervous system, cardiovascular system and/or the renal system) and the possibility of irreversible organ-damage. ... Bupropion (INN; also amfebutamone,[1] brand names Wellbutrin, Zyban, Budeprion and Buproban) is an atypical antidepressant, which acts as a norepinephrine reuptake inhibitor and dopamine reuptake inhibitor,[2] and a nicotinic antagonist. ... Prozac, a selective serotonin reuptake inhibitor (SSRI) Serotonin-norepinephrine reuptake inhibitor, Venlafaxine An antidepressant is a psychiatric medication or other substance (nutrient or herb) used for alleviating depression or dysthymia (milder depression). ... Norepinephrine reuptake inhibitors (NRIs) are compounds that increase amounts of the neurotransmitter norepinephrine in the brain by inhibiting its reuptake at synapses. ... This does not cite any references or sources. ... SSRI is an acronym that stands for several things: It is a class of antidepressants called selective serotonin reuptake inhibitor SSRI also is used as the stock symbol for Silver Standard Resources Inc. ... Hypersomnia, also known as excessive daytime sleepiness (EDS), is excessive amount of sleepiness. ... Exhaustion redirects here. ...


A patient's doctor may have to change the antidepressant taken, adjust the dosages of medications, or try different combinations of antidepressants before finding the most effective option for the patient; response rates to the first agent administered may be as low as 50%.[41] It may take anywhere from 3 to 8 weeks after the start of medication before its therapeutic effects can be fully discovered. Patients are generally advised not to stop taking an antidepressant suddenly and to continue its use for at least four months to prevent the chance of recurrence. For patients that have chronic depression, medication may need to be continued for the remainder of their life.[1]


[edit] Psychotherapy

There are a number of psychotherapies for depression. These psychotherapies may be provided individually or in a group format. Psychotherapy can be delivered by a variety of mental health professionals, including psychotherapists, psychiatrists, psychologists, clinical social workers, or psychiatric nurses. Image File history File links Question_book-3. ...


The most studied form of psychotherapy for depression is cognitive therapy (also called Cognitive behavioral therapy). Several clinical trials have shown that CBT is as effective as anti-depressant medications, even among more severely depressed patients. While the precise mechanisms of change in CBT remain an active area of research, CBT is thought to work by teaching patients to learn a set of cognitive and behavioral skills, which they can employ on their own. A Cognitive Behavioral Therapy (CBT) is a psychotherapy based on modifying cognitions, assumptions, beliefs and behaviors, with the aim of influencing disturbed emotions. ...


A number of other psychotherapies for depression exist. There is evidence that behavior therapy (called behavioral activation in the treatment of depression) and interpersonal therapy are effective treatments for depression. Interpersonal psychotherapy focuses on the social and interpersonal triggers that may cause depression. Behavioral therapy is based on the assumption that behaviors are learned. Some behavior analytic models trace some depressions to childhood (see child development). This type of therapy attempts to teach people to learn healthier behaviors. Therapy can be used to help a person develop or improve interpersonal skills in order to allow him or her to communicate more effectively and reduce stress. Narrative therapy gives attention to each person's "dominant story" by means of therapeutic conversations, which also may involve exploring unhelpful ideas and how they came to prominence. Possible social and cultural influences may be explored if the client deems it helpful. Supportive therapy encourages people to discuss their problems and provides them with emotional support. The focus is on sharing information, ideas, and strategies for coping with daily life. Family therapy helps people live together more harmoniously and undo patterns of destructive behavior. Cognitive therapy or cognitive behavior therapy is a kind of psychotherapy used to treat depression, anxiety disorders, phobias, and other forms of mental disorder. ... This article or section does not cite its references or sources. ... Interpersonal skills refer to mental and communicative algorithms applied during social communications and interactions in order to reach certain effects or results. ... Narrative Therapy was initially developed during the 1970s and 1980s, largely by Australian Michael White (Dulwich Centre) and his friend and colleague, David Epston, of New Zealand. ... Family therapy, also referred to as couple and family therapy and family systems therapy, is a branch of psychotherapy that works with families and couples in intimate relationships to nurture change and development. ...


Earlier research initially suggested that psychotherapy, specifically cognitive-behavioral therapy, was not as effective as medication in the treatment of depression; however, recent research suggests that CBT can perform as well as anti-depressant medication in the treatment of moderate to severe depression treated on an outpatient basis.[citation needed] With more complex and chronic forms of depression the most effective treatment is often a combination of medication and psychotherapy.[42]


[edit] Electroconvulsive therapy

Electroconvulsive therapy (ECT), also known as electroshock or electroshock treatment, uses short bursts of a controlled current of electricity (typically fixed at 0.9 ampere) into the brain to induce a brief, artificial seizure while the patient is under general anesthesia. Electroconvulsive therapy (ECT), also known as electroshock, is a controversial psychiatric treatment in which seizures are induced with electricity for therapeutic effect. ... Electricity (from New Latin ēlectricus, amberlike) is a general term for a variety of phenomena resulting from the presence and flow of electric charge. ... This article is about epileptic seizures. ... This article or section may be confusing for some readers, and should be edited to be clearer. ...


In contrast to direct electroshock of years ago, most countries now allow ECT to be administered only under anaesthesia. In a typical regimen of treatment, a patient receives three treatments per week over three or four weeks. Repeat sessions may be needed. Short-term memory loss, disorientation, and headache are very common side effects. Detailed neuropsychological testing in clinical studies has not been able to prove permanent effects on memory. ECT offers the benefit of a very fast response; however, this response has been shown not to last unless maintenance electroshock or maintenance medication is used. Whereas antidepressants usually take around a month to take effect, the results of ECT have been shown to be much faster. For this reason, it is the treatment of choice in emergencies (e.g., in catatonic depression in which the patient has ceased oral intake of fluid or nutrients). Short-term memory, sometimes referred to as primary, working, or active memory, is that part of memory which stores a limited amount of information for a few seconds. ...


There remains much controversy over ECT. Social critics such as