Cognitive benefits of sleep and their loss due to sleep deprivation
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Figure. Exemplary study showing the benefit of sleep for motor learning (adapted from Walker et al.4). (A) Method. Wake (control) group was trained on a motor-memory task in the morning, and then tested again after 12 hours of wakefulness. Sleep (experimental) group was trained in the evening; then this group was tested in the morning following a night’s sleep. (B) Results. Testing after a 12-hour period which contained sleep resulted in a statistically significant improvement in performance when compared to a 12-hour period of wakefulness. Train = performance during the last (and therefore best) trials of training; test = performance on testing 12-hours later, either after a waking day (wake group) pr after a night which included sleep (sleep group).
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