gland in the brain secreting the hormone melatonin.

disorder occuring during the transition from wakefulness to sleep or from one sleep stage to another;  a form of parasomnia

progressive, stepwise increase in CPAP pressure applied during a polysomnogram to establish the optimal treatment pressure

Phases of the daily sleep/wake cycle are advanced with respect to clock time. This is classified as a circadian rhythm disorder. The sleep phase occurs well ahead of the conventional bedtime and the t [..]

EEG oscillations, prominent over the occipital cortex, with a frequency of 8-13 Hz in adults;  indicative of the awake state; present in most, but not all, normal individuals; most consistent and pred [..]

brief occurrence of alpha activity during a stage of sleep.

Literally means "no breath", the cessation of airflow at the nostrils and mouth for at least 10 seconds.

A measure of the severity of sleep apnea; the number of apnea events per hour.

the number of apneas and hypopneas per hour. 5-20=mild, 21-50=moderate, above 51 severe

abrupt change from sleep to wakefulness, or from a "deeper" stage of non-REM sleep to a "lighter" stage