Images of lost sleep
Article Abstract:
It has been established that the areas of the cerebral cortex that work the hardest during wakefulness have a greater need for sleep. These areas and the cognitive activities they control are therefore more vulnerable to sleep deprivation, even with some form of compensatory effect. This research is the first to investigate the impact of sleep deprivation on performance using brain-imaging techniques. It is proposed that cortical regions not usually involved with the task concerned can in some way be recruited to assist, unless they are preoccupied. The greater the activation in the parietal lobes following sleep deprivation, the greater the subjective feelings of tiredness and the less the impairment to free recall.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Altered brain response to verbal learning following sleep deprivation
Article Abstract:
There are complex and dynamic neural mechanisms affecting cognitive performance following sleep deprivation. These mechanisms are partly different from those used in the non-sleep deprived state. This research found that the prefrontal cortex was more responsive following one night of sleep deprivation than after normal sleep. Raised subjective tiredness in sleep-deprived subjects was strongly linked with activation of the prefrontal cortex. It is suggested that the impact of sleep deprivation on cognitive performance and related patterns of cerebral activation may be partly dependent on task-specific demands.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Seeing in the sound zone
Article Abstract:
New research provides strong evidence for the extreme sensitivity of cortical development to external cues. Retinal inputs into the auditory thalamus are sufficient to explain a V1 pattern of development.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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