the symptom of being overly sleepy
sometimes called excessive sleepiness, the inability to stay awake during the normal wake period of a sleep-wake cycle or may involve involuntary sleep. Common causes include: insufficient sleep, sleep apnea, narcolepsy, and insomnia.
(also "excessive daytime somnolence") - subjective report of difficulty in staying awake, accompanied by a ready entrance into sleep when the individual is sedentary EDS suggests the presence of a significant sleep disorder and is different from fatigue. Depression, anxiety, stress, and boredom are commonly thought to cause excessive sleepiness, but in fact these conditions cause fatigue and apathy.
A neurological disorder in which there is a sudden recurrent uncontrollable compulsion to sleep. Excessive daytime sleepiness is also known as narcolepsy. See the entire definition of Excessive daytime sleepiness
The principle symptom of narcolepsy, described as a continuous, subjective feeling of sleepiness, which may also be associated with irresistible attacks of sleep.
EDS/ Somnolence / Hypersomnia Excessive daytime sleepiness is also called excessive sleepiness or EDS or Somnolence or Hypersomnia, refers to either excessive sleepiness during the day or extended, overly long periods of nighttime sleep. It may be associated with difficulty in awakening.
A subjective report of difficulty in maintaining the awake state, accompanied by a ready entrance into sleep when the individual is sedentary; may be quantitatively measured by use of subjectively defined rating scales of sleepiness.