Sleep Deprived

by kwolf4 on Octobre 25, 2016 - 2:37pm

     It is no surprise that a night without enough sleep can lead to a groggy morning, but that is not the only thing that can happen when the body needs more sleep. There are more frightening effects to sleep deprivation, if a person is deprived of sleep it can lead to emotional and physical problems. Research over the years has shown that people can be physically and psychologically damaged from not getting enough sleep. Learning what happens in people who are sleep deprived can help researchers better understand the function of sleep and its importance for both physical and emotional health. In the article, Sleep Deprivation Produces Feelings of Vicarious Agency by Nicholas Hon and Jia-Hou Poh, studies the effects of being in a non-optimal state, when sleep deprived on judgement agency. They found that 24 hours of total sleep deprivation elevated agency ratings on trials designed to produce sense of non-agency. That data provides the first evidence that physiological state variables can affect agency processing in the normal population. In the study, the 36 participates had regular sleep habits, were not on any long-term medications, had no history or symptoms of sleep disorders and drank less than 3 caffeinated drinks per day.  The sleep patterns were monitored by a wrist-worn actigraphy throughout the study. Their main finding was that being in a sleep-deprived state had a reliable effect on an individual’s ability to accurately sense a lack of agency in each outcome. They observed that sleep deprivation produced vicarious agency in non-agency. However, the ratings on agency trials were unaffected by TSD. They propose that the TSD affects the comparison process, that quality of the mismatches between the predicted and actual outcomes. Their data suggests that mismatch processing within the context of agency judgment was also affected by TSD. The neuroimaging studies revealed that sensing non-agency is associated with a network of frontal and parietal areas which include the dorsolateral prefrontal cortex, angular gyrus and temporoparietal junction. In their conclusion, although agency distortions are observed, they demonstrate a distortion that is a consequence of non-optimal state. That this represents the first evidence that physiological state variables can influence agency processing. 


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