Hypersomnia - refers to a type of type of dyssomnia that involves being  chronically sleepy and sleeping for long periods at a time. Also means  sleeping too much or being too sleepy during the day. It is a sleeping disorder; an abnormally excessive sleep. A person with this condition  falls asleep several times a day.
Other /More definition:
Hypersomnia refers to excessive daytime sleepiness. This can result from depression, insomnia, narcolepsy, sleep apnea, sleep drunkenness, periodic limb movements, drug abuse, and other problems. Hypersomnia is abnormally excessive sleep. A person with this condition falls asleep several times a day, chronically sleepy and sleeping for long periods at a time. Hypersomnia is also defined as a sleep disturbance in which the affected individual sleeps too much or being too sleepy during the day.
List of books: Hypersomnia
Other /More definition:
hypersomnia refers to abnormally excessive sleep. A person with this condition falls asleep several times a day.

Related Articles

Modafinil at psychology-glossary.com■■■■■■■■■■
Modafinil: Modafinil refers to an oral drug for the treatment of Narcolepsy which was first approved . . . Read More
Breathing-related sleep disorder at psychology-glossary.com■■■■■■■■■■
breathing-related sleep disorder: breathing-related sleep disorder refers to sleep disruption leading . . . Read More
Narcolepsy at psychology-glossary.com■■■■■■■■■■
Narcolepsy: Narcolepsy refers to a sudden, irresistible, daytime sleep attacks that may last anywhere . . . Read More
Antidepressant at psychology-glossary.com■■■■■■■■
Antidepressant: Antidepressant refers to a type of medication used to treat depression and related conditions. . . . Read More
Zolpidem at psychology-glossary.com■■■■■■■■
Zolpidem: Zolpidem is classified as a hypnotic drug. These drugs help people sleep; - - In the United . . . Read More
Insomnia at psychology-glossary.com■■■■■■■
Insomnia: Insomnia is defined as the inability to fall asleep, to maintain sleep, or to get back to sleep . . . Read More
Dyssomnia at psychology-glossary.com■■■■■■■
Dyssomnia: Dyssomnia refers to the problem in getting to sleep or in obtaining sleep of sufficient quality. . . . Read More
Huntington’s disease at psychology-glossary.com■■■■■■■
Huntington’s disease: Huntington’s disease or HD refers to a genetic disorder marked by involuntary . . . Read More
Benzodiazepine at psychology-glossary.com■■■■■■■
Benzodiazepine: Benzodiazepine refers to antianxiety drug such as Valium, Xanax, Dalmane, or Halcion . . . Read More
Periodic Limb Movements in Sleep at psychology-glossary.com■■■■■■■
Periodic Limb Movements in Sleep: Periodic Limb Movements in Sleep or PLMS refers to a sleeping disorder . . . Read More