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But sundowning has some unique signs that make it stand out from just being tired. “Fatigue can occur at all times of the day. Sundowning is truly confusion,” Dr. Kobylarz says.
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The current formal name established in the third edition of the International Classification of Sleep Disorders (ICSD-3) is delayed sleep-wake phase disorder. Earlier, and still common, names include delayed sleep phase disorder (DSPD), delayed sleep phase syndrome (DSPS), delayed sleep phase type (DSPT), and circadian rhythm sleep disorder. [37]
Feeling sleepy and lacking enthusiasm during the day could increase the risk of developing a cognitive disorder leading to dementia, a new study found. Sleep expert Dr. Wendy Troxel discusses.
In individuals deprived of sleep, somnolence may spontaneously dissipate for short periods of time; this phenomenon is the second wind, and results from the normal cycling of the circadian rhythm interfering with the processes the body carries out to prepare itself to rest. The word "somnolence" is derived from the Latin "somnus" meaning "sleep".
Sleep inertia is a physiological state of impaired cognitive and sensory-motor performance that is present immediately after awakening. It persists during the transition of sleep to wakefulness, where an individual will experience feelings of drowsiness, disorientation and a decline in motor dexterity.
Don’t take naps after mid-afternoon. ... If you can’t fall asleep after 20 minutes, get up and do a relaxing activity until you feel tired again. If none of those help, contact your doctor ...
A second wind may come more readily at certain points of the circadian (24hr) biological clock than others.. Second wind (or third wind, fourth wind, etc.), a colloquial name for the scientific term wake maintenance zone, is a sleep phenomenon in which a person, after a prolonged period of staying awake, temporarily ceases to feel drowsy, often making it difficult to fall asleep when exhausted.