Somnolence (or "drowsiness", or "hypersomnia") is a state of near-sleep, a strong desire for sleep, or sleeping unusually long periods. It can refer both to a specific incidence preceeding falling asleep, or a chronic condition refering to being in that state independent of a circadian rhythm. The term symptom (from the Greek syn = con/plus and pipto = fall, together meaning co-exist) has two similar meanings in the context of physical and mental health: A symptom may loosely be said to be a physical condition which shows that one has a particular illness or disorder (see... In medicine, a sign is a feature of disease as detected by the doctor during physical examination of a patient. ... The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... In an ideal situation, sleep should be undisturbed and experienced in the same room every night Sleep is the regular state of natural rest observed in all mammals, birds and fish. ... The circadian rhythm is a name given to the internal body clock that regulates the (roughly) 24 hour cycle of biological processes in animals and plants. ...

It is considered a lesser impairment of consciousness than stupor or coma. This article is being considered for deletion in accordance with Wikipedias deletion policy. ... This article is in need of attention from an expert on the subject. ...

Associated conditions

• obesity
• narcolepsy
• tranquilizers
• clinical depression

Narcolepsy is a neurological condition characterized by severe fatigue, irresistible episodes of sleep and general sleep disorder. ... A sedative is a drug that depresses the central nervous system (CNS), which causes calmness, relaxation, reduction of anxiety, sleepiness, slowed breathing, slurred speech, staggering gait, poor judgment, and slow, uncertain reflexes. ... Clinical depression is a health condition of depression with mental and physical components reaching criteria generally accepted by clinicians. ...

See also

• insomnia
• hypersomnia
• dyssomnia

Insomnia is a sleep disorder characterized by an inability to sleep and/or to remain asleep for a reasonable period during the night. ... Hypersomnia is an excessive amount of sleepiness, resulting in an inability to stay awake. ... Dyssomnias are a broad classification of sleeping disorder that make it difficult to get to sleep, or to stay sleeping. ...

External links

• NIH/Medline
• eMedicine - primary hypersomnia
• NINDS Hypersomnia Information Page