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首页> 外文期刊>Cerebral cortex >Impairment of attentional networks after 1 night of sleep deprivation.
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Impairment of attentional networks after 1 night of sleep deprivation.

机译：一夜睡眠剥夺后注意力网络受损。

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摘要

Here, we assessed the effects of sleep deprivation (SD) on brain activation and performance to a parametric visual attention task. Fourteen healthy subjects underwent functional magnetic resonance imaging of ball-tracking tasks with graded levels of difficulty during rested wakefulness (RW) and after 1 night of SD. Self-reports of sleepiness were significantly higher and cognitive performance significantly lower for all levels of difficulty for SD than for RW. For both the RW and the SD sessions, task difficulty was associated with activation in parietal cortex and with deactivation in visual and insular cortices and cingulate gyrus but this pattern of activation/deactivation was significantly lower for SD than for RW. In addition, thalamic activation was higher for SD than for RW, and task difficulty was associated with increases in thalamic activation for the RW but not the SD condition. This suggests that thalamic resources, which under RW conditions are used to process increasingly complex tasks, are being used to maintain alertness with increasing levels of fatigue during SD. Thalamic activation was also inversely correlated with parietal and prefrontal activation. Thus, the thalamic hyperactivation during SD could underlie the reduced activation in parietal and blunted deactivation in cingulate cortices, impairing the attentional networks that are essential for accurate visuospatial attention performance.
机译：在这里，我们评估了睡眠剥夺（SD）对大脑激活和执行参数化视觉注意任务的性能的影响。 14名健康受试者在休息的清醒（RW）以及SD的1夜后，对球的跟踪任务进行了功能性磁共振成像，并确定了难度分级。与RW相比，SD的所有困难水平的困倦者自我报告明显更高，认知能力明显更低。对于RW和SD会话，任务难度都与顶叶皮层的激活，视觉和岛皮质和扣带回的失活有关，但SD的这种激活/失活模式明显低于RW。此外，SD的丘脑激活高于RW，并且任务困难与RW的丘脑激活增加有关，但与SD条件无关。这表明，在RW条件下，丘脑资源被用于处理日益复杂的任务，并随着SD期间疲劳程度的提高而保持机敏。丘脑激活与顶叶和额叶前激活也呈负相关。因此，SD期间丘脑过度激活可能是扣带状皮质的顶叶钝化和钝化钝化降低的基础，从而损害了对精确视觉空间注意力表现必不可少的注意力网络。

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