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In fact, many studies have found a bidirectional relationship between stress and sleep. This means that sleep quality can affect stress levels, and stress levels can affect sleep quality. Sleep change depends on the type of stressor, sleep perception, related psychiatric conditions, environmental factors, and physiological limits. [5] [6] [4] [7]
It has been found that emotions vary depending on the circadian rhythm and the duration of how long one was awake. [45] Circadian sleep-rhythm disorders like shift-work disorder or Jetlag-disorder have been found to similarly contribute to the Dysregulation of affect, with symptoms like irritability, anxiety, apathy and dysphoria. [46]
Sleep apnea is the second most frequent cause of secondary hypersomnia, affecting up to 4% of middle-aged adults, mostly men. Upper airway resistance syndrome (UARS) is a clinical variant of sleep apnea that can also cause hypersomnia. [8] Just as other sleep disorders (like narcolepsy) can coexist with sleep apnea, the same is true for UARS.
While the study shows a correlation between sleep quality and signs of brain aging, the findings do not prove that sleep issues accelerate brain aging. Key takeaways: The study included 589 people ...
While the body benefits from sleep, the brain actually requires sleep for restoration, whereas these processes can take place during quiescent waking in the rest of the body. [98] The essential function of sleep may be its restorative effect on the brain: "Sleep is of the brain, by the brain and for the brain."
This is known as free-running sleep. [citation needed] People with the disorder may have an especially hard time adjusting to changes in "regular" sleep–wake cycles, such as vacations, stress, evening activities, time changes like daylight saving time, travel to different time zones, illness, medications (especially stimulants or sedatives ...
People with high blood pressure who slept for shorter durations were more ... scans to assess changes in brain structure. ... so the data on sleep duration may not represent long-term sleep ...
A total of 632 participants, half with iRBD and half without, completed self-report questionnaires. The study results suggest that people with iRBD are more likely to report having a first-degree relative with the same sleep disorder than people of the same age and sex who do not have the disorder. [9]