Sleep disorder

Sleep disorder

The disturbance of normal sleep patterns caused by a broad range of illnesses, including dysfunctional sleep mechanisms, abnormalities in physiological functions during sleep, abnormalities of the biological clock, and sleep disturbances that are induced by factors extrinsic to the sleep process.

Industry: Health care

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Sleep disorder

Electrooculogram (EOG)

Health care; Sleep disorder

A measurement of the electrical activity or resting potential associated with eye movements. The resulting signal is called the electrooculogram. Unlike the electroretinogram, the EOG does not ...

Non-REM sleep (NREM)

Health care; Sleep disorder

A normal part of sleep accounting for typically 75-80% of sleep time. characterised by slower and larger brain waves than in REM. By larger, we mean greater amplitude in the EEG output.

Hypnic jerk

Health care; Sleep disorder

A startle reaction as a person falls asleep; muscle jerks like an electric shock. Normal. Everyone experiences them. Also called a sleep start or a hypnagogic jerk.

Phase delay

Health care; Sleep disorder

A shift later in time, for instance if one's sleep cycle moves ahead on the clock.

Photoreceptor

Health care; Sleep disorder

A molecule or structure that can detect light by capturing photons.

Sleep apnea

Health care; Sleep disorder

Condition where the sleeper repeatedly stops breathing for 10 or more seconds during sleep. The Greek word "apnea" literally means "without breath." There are three types of apnea: obstructive, ...

Jet lag

Health care; Sleep disorder

Describes a combination of symptoms induced by a major rapid shift in environmental time during travel to a new time zone. Called "jet" lag because of the often noticed after airplane flights. ...