Category: S

An autosomal dominant condition in which the person sleeps well and for a normal amount of time but not at the usual bedtime hours. Those with delayed sleep-phase syndrome may function best if they go to sleep about the time most people are awakening. Those with advanced sleep phase syndrome do best when they go…

Staying asleep after initially falling asleep. Patients with sleep maintenance insomnia fall asleep easily but then awaken in the middle of the night and have difficulty resting or sleeping after that.  

Operating a motor vehicle without being fully awake and alert, especially when consciousness is affected by sedative or hypnotic drugs.  

The organization of brain wave activity characteristic of each of the stages of sleep.  

The influence of behavioral patterns or sleeping environment on the quality and quantity of sleep. Persons with insomnia not caused by a known disease may find that the following may assist in obtaining a good night’s sleep: establishing a routine time to go to bed; avoiding trying to sleep; using practices that assist in going…

A condition in which one requires a long period of time to become fully alert upon awakening from deep sleep. During the transition period, the affected person may become ataxic, disoriented, or aggressive. Persons whose usual awakening sequence includes sleep drunkenness should not attempt to make decisions until they are fully alert and awake.  

The consequences (e.g., fatigue, loss of concentration, or difficulties in coping or job performance) of getting less than an optimal amount of sleep. Most people feel and perform best with 6 to 8 hours of sleep each night.  

A device that allows body movements to be transferred to a machine either directly or by remote control (e.g., an apparatus for lifting, squeezing, and turning laboratory equipment containing radioactive materials). The remote “hands” are controlled by the operator from a sufficient distance, and proper shielding is used to prevent the operator from being exposed…

A tube of solid culture medium that is slanted to increase the surface area of the medium; used in culturing bacteria.  

A loss of normal skin folds and shrinkage of collagen either as a result of overly aggressive resurfacing of the skin or as a consequence of a sclerosing disorder such as progressive systemic sclerosis.