Table 1 The best-characterized non-mammalian animal models currently used in sleep research * ... In REM sleep the muscle tone is reduced or absent, but the EEG is similar to waking.

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Getting only six hours of sleep per night consistently isn’t enough for everyone and can have adverse effects over time. Find ...

Struggling with sleep after 50? Discover why restful sleep is essential for women’s health, how to spot signs of sleep apnea, and tips to improve your sleep naturally.