| sleep apnea syndrome | <syndrome> A disorder characterised by multiple episodes of partial or complete cessation of respiration during sleep. (05 Mar 2000) |
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| sleep apnea syndromes | Disorders involving apneic episodes during sleep. They may be due to cessation of diaphragmatic movement, obstruction of upper airway air flow, or a combination of these, and may be associated with hypersomnolence, insomnia, or obesity. (12 Dec 1998) |
| sleep apnoea | <chest medicine> Apnoea caused by upper airway obstruction during sleep, associated with frequent awakening and often with daytime sleepiness. There are three main forms: central sleep apnoea, obstructive sleep apnoea and mixed sleep apnoea. (27 Sep 1997) |
| sleep-at-noon | <botany> A plant (Tragopogon pratensis) which closes its flowers at midday; a kind of goat's beard. Source: Websters Dictionary (01 Mar 1998) |
| sleep deprivation | The condition of being deprived of sleep either under experimental or under unusual real life conditions, as distinguished from being unable to sleep. (12 Dec 1998) |
| sleep disorders | Disturbances of usual sleep patterns or behaviours. (12 Dec 1998) |
| sleep dissociation | <neurology, physiology> A condition that occurs in REM stage sleep. There is no movement of the skeletal muscles in this stage of sleep. See: REM stage sleep. (27 Sep 1997) |
| sleep drunkenness | A half-waking condition in which the faculty of orientation is in abeyance, and under the influence of nightmare-like ideas the person may become actively excited and violent. Synonym: somnolentia. (05 Mar 2000) |
| sleep epilepsy | Incorrect term for narcolepsy. (05 Mar 2000) |
| sleep-induced apnea | Apnea resulting from failure of the respiratory centre to stimulate adequate respiration during sleep; divided into respiratory pause (cessation of air flow for less than 10 seconds) and apneic pause (cessation of air flow greater than 10 seconds). (05 Mar 2000) |
| sleep paralysis | <neurology, physiology> A condition that occurs in REM stage sleep. There is no movement of the skeletal muscles in this stage of sleep. See: REM stage sleep. (27 Sep 1997) |
| sleep phase delay syndrome | <syndrome> A disorder in which the circadian rhythm of sleep and waking falls into a delayed but stable relationship with external time cues of day and night. (05 Mar 2000) |
| sleep, rem | A stage of sleep characterised by rapid movements of the eye and low voltage fast pattern eeg. It is usually associated with dreaming. (12 Dec 1998) |
| sleep spindle | The electroencephalographic record of 14-per-second bursts of wave frequency seen on EEG examination. (05 Mar 2000) |
| sleep stages | Periods of sleep manifested by changes in eeg activity and certain behavioural correlates; includes stage 1: sleep onset, drowsy sleep; stage 2: light sleep; stages 3 and 4: delta sleep, light sleep, deep sleep, telencephalic sleep. (12 Dec 1998) |