Misperception And Disorientation During Sleep Deprivation Pdf
File Name: misperception and disorientation during sleep deprivation .zip
Washington, D. Walter Reed Army Institute of Research.
Misperception and Disorientation During Sleep Deprivation
As critical as waking brain function is to cognition, an extensive literature now indicates that sleep supports equally important, different, yet complementary operations. This chapter first considers evidence for the role of sleep in memory processing, principally focusing on declarative memory. Second, at a neural level, several mechanistic models of sleep-dependent plasticity underlying these effects will be reviewed, with a synthesis of these features offered that may explain the ordered structure of sleep and the orderly evolution of memory stages. Third, accumulating evidence for the role of sleep in associative memory processing will be discussed, suggesting that the long-term goal of sleep may not be the strengthening of individual memory items, but instead their abstracted assimilation into a schema of generalized knowledge. Finally, the newly emerging benefit of sleep in regulating affective brain reactivity will be considered, leading to a framework of sleep-dependent emotional processing. Matthew P.
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. In the majority of cases, morning sleep inertia is experienced for 15 to 30 minutes after waking. Sleep inertia is of concern when decision-making abilities, safety-critical tasks and the ability to operate efficiently are important soon after awakening. In these situations, it poses an occupational hazard due to the cognitive and motor deficits that may be present. These symptoms are expressed with the greatest intensity immediately after waking, and dissipate following a period of extended wakefulness.
Background: Going without sleep for long periods of time can produce a range of experiences, including perceptual distortions and hallucinations. Many questions, however, remain unanswered regarding the types of symptoms which are most reliably elicited, the time of symptom onset, and whether symptoms worsen over time toward psychotic decompensation. Since sleep deprivation exceeding 48 h is considered unethical today, an examination of historical studies with extreme sleep-loss duration is needed to obtain information about what happens during prolonged sleep loss. Methods: A systematic-review approach was used to identify experimental and observational studies of sleep deprivation in healthy people which describe the effects of prolonged sleep loss on psychopathological symptoms, without any date restriction. Results: A total of articles were identified.
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