In Psychology (ancient Greek: psyche = soul and logos = word) is the study of mind, thought, and behaviour. It is largely concerned with humans, although the behaviour and thought of other animals is also studied; either as a subject in its own right (see animal cognition), or more controversially, as a way... psychology, anhedonia is a patient's inability to experience This article is about an emotion. Happiness is also a 1998 U.S. film written and directed by Todd Solondz. See also Joy for the disambiguation of that term. Happiness, pleasure or joy is the emotional state of being happy. The definition of happiness is one of the greatest philosophical... pleasure from normally pleasurable life events such as eating, exercise, and social/sexual interactions.

It is most commonly seen in the A mood disorder is a condition where the prevailing emotional mood is distorted or inappropriate to the circumstances. Mood disorders can be categorized as: Manic depression, including Depression, which includes conditions such as Cyclothymia and Dysthymia Bipolar disorder (depression with mania or hypomania) Please note that many of the terms... mood disorder In ordinary conversation, nearly any mood with some element of sadness may be called depressed. However, for depression to be termed clinical depression it must reach criteria which are generally accepted by clinicians; it is more than just a temporary state of sadness. Generally, when symptoms last two weeks or... depression, although it is also seen in Schizophrenia is a psychiatric diagnosis denoting a persistent, often chronic, mental illness variously affecting behavior, thinking, and emotion. The term schizophrenia comes from the Greek words σχίζω (schizo, split or divide) and φρενός (phrenos, mind) and is best translated as shattered... schizophrenic disorders and other The Scream, the famous painting commonly thought of as depicting the experience of mental illness. A mental illness is a psychiatric disorder that results in a disruption in a persons thinking, feeling, moods, and ability to relate to others. Mental illness is distinct from the legal concept of insanity... mental disorders.

Anhedonia is often experienced by drug addicts following withdrawal; in particular, stimulants like Cocaine is a crystalline alkaloid that is obtained from the leaves of the coca plant. It is a stimulant of the central nervous system and an appetite suppressant, creating a euphoric sense of happiness and increased energy. Though most often used recreationally for this effect, cocaine is also a topical... cocaine and This article needs to be cleaned up to conform to a higher standard of article quality. After the article has been cleaned up, you may remove this message. For help, see How to Edit a Page and the Style and How-to Directory. Far, far too many question marks in... amphetamines cause anhedonia and In everyday language depression refers to any downturn in mood, which may be relatively transitory and perhaps due to something trivial. This is differentiated from Clinical depression which is marked by symptoms that last two weeks or more and are so severe that they interfere with daily living. In the... depression by depleting Dopamine is a neurotransmitter in the brain. As a member of the catecholamine family, dopamine is a precursor to epinephrine (adrenaline) and norepinephrine (noradrenaline) in the biosynthetic pathways for these neurotransmitters. Dopamine is synthesized in the body (mainly nervous tissue and adrenal glands) by the decarboxylation of DOPA by aromatic... dopamine and other important Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a presynaptic and a postsynaptic neuron. A chemical is classified as a neurotransmitter if it respects the following conditions: It is synthesized endogenously It is available in sufficient quantity in the presynaptic neuron to exert an... neurotransmitters.