Exact(3)
During the follow-up of 1981 to 1999, the length of sleep shortened among the healthy twins.
Sleep during depressive episodes is characterized by a reduction in SWS, or increased latency to SWS, increased duration of R sleep, shortened latency to R sleep, continuity disturbances, and decreased TST [ 9- 12].
Acute symptoms are difficulty getting to sleep, shortened sleep, and somnolence during working hours that continues into the following days off. 2 Night shift workers sleep on average 25 33% less than day shift workers, 3 and they lose 1 4 h of sleep each night for 3 days after they rotate shifts.
Similar(57)
As to sleep variables a deficit of slow wave sleep in the first sleep cycle, decreased sleep continuity, shortened latency to rapid eye movement (REM) sleep and increased amount of phasic components of REM sleep have been suggested as vulnerability markers [ 30, 37, 41, 47].
Increased estrogen levels have been hypothesized to improve sleep by shortening sleep latencies [ 18]; reducing nocturnal restlessness and nighttime awakenings [ 11, 19]; decreasing movement arousals [ 7]; improving sleep efficiency [ 20]; and increasing REM sleep [ 8, 21, 22].
At diagnosis children with narcolepsy with cataplexy showed an increase of sleep time during the 24 h; at follow-up sleep time and nocturnal sleep latency shortened, in the absence of other polysomnographic or clinical (including body mass index) changes.
22 Sleep quality worsened 23 24 or sleep duration shortened 23 25–27 with increasing MP use time.
As children age, their nightly sleep shortens, according to these results.
Intake of caffeine an hour prior to sleep shortens total sleep time and shortens the length of those more useful stages of sleep (3 and 4).[4].
REM sleep latency shortened significantly.
It can be speculated that objective sleep abnormalities (like shortened REM sleep latency) previously reported in depressed children and adolescents in stable recovery [ 19] might have been present in our remitted subjects even in the absence of subjective sleep complaints.
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