rapid eye movement sleep

Caption: Figure 2: Polysomnography pictures (30 seconds recording) show generalized spike waves during drowsiness (a) and central sleep apneas (3 minutes recording) during the REM stage (b).

Higuchi dimension of REM stage, and sleep stage 1--[nHFD.sub.s4] and [nHFD.sub.S1]) along with the more traditional CAP features (i.e.

The advantage of this system is that we can reduce the number of equipments used in the polysomnography for REM stage detection it make the sleep studies easier.

As the night progresses, the SWS stages shorten and the REM stage lengthens so that the pre midnight hours involve more time spent in SWS and less time in REM, and the post midnight and early morning hours including fewer SWS stages and a prolonged REM stage.

The patient spent 1% of his sleep in stage 1, 78% in stage II, 2% in stage III, and 10% in the REM stage. His snoring was rated as 8 on a scale of 10.

Diagnostic criteria include either a history of problematic motor behavior (such as restless leg syndrome) during sleep or observed integrated motor activity during the REM stage. These must be coupled with intermittent or persistent electromagnetic augmentation during REM sleep, signifying a loss of atonia, Dr Schenck said.

"One's quality of sleep depends on how long their REM stage is.

Normally people do not move while dreaming during the REM stage of sleep; however, people with RBD tend to move and vocalize--sometimes violently.

The sleep duration is categorised into two parts out of which REM stage is the longest one.

Although large amounts of alcohol suppress the first stage of sleep (known as REM), sending us into a deep sleep, as it wears off the suppressed REM stage kicks in too early and we end up tossing and turning.