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RBD is a sleep disorder characterized by the loss of normal skeletal muscle atonia during REM sleep and is associated with prominent motor activity and vivid dreaming. [ 9 ] Symptomatic RBD can also be associated with narcolepsy , Guillain–Barré syndrome , limbic encephalitis , and Morvan's syndrome .
Night sweats or nocturnal hyperhidrosis [1] is the repeated occurrence of excessive sweating during sleep. [2] The person may or may not also perspire excessively while awake. One of the most common causes of night sweats in women over 40 is the hormonal changes related to menopause and perimenopause . [ 3 ]
Each sleep cycle lasts about 90 to 110 minutes and includes stages that fall into two main phases: non-REM (or NREM) sleep and REM sleep. Non-REM sleep has three sub-stages: light sleep, deep ...
Night terror, also called sleep terror, is a sleep disorder causing feelings of panic or dread and typically occurring during the first hours of stage 3–4 non-rapid eye movement (NREM) sleep [1] and lasting for 1 to 10 minutes. [2]
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During a night of sleep, humans usually experience about four or five periods of REM sleep; they are shorter (~15 min) at the beginning of the night and longer (~25 min) toward the end. Many animals and some people tend to wake, or experience a period of very light sleep, for a short time immediately after a bout of REM.
Hot flashes, night sweats, and heat sensitivity can be a sign of hyperthyroidism, hormonal changes, or menopause. Here, experts share potential causes.