Type of sleep
Difficulty with either initially falling asleep (sleep onset insomnia) or remaining asleep (sleep maintainenece insomnia) despite adequate opportunity, conditin, and time for sleep
Short and inadequate, light and easily disrupted, poor quality, unrefreshing, unsatisfactory, non restorative
report greater subjective sleep disturbance compared to objective PSG parameters
perceptio of sleep is altered
may overestimate the duration of sleep latencies
NO longer just non restorative sleep only