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首页> 外文期刊>The European Journal of Neuroscience >Rhinal-hippocampal EEG coherence is reduced during human sleep.
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Rhinal-hippocampal EEG coherence is reduced during human sleep.

机译：在人类睡眠期间，鼻-海马脑电图的一致性降低。

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摘要

The deficiency of declarative memory compared with waking state is an often overlooked characteristic of sleep. Here, we investigated whether rhinal-hippocampal coherence, an electrophysiological correlate of declarative memory formation, is significantly altered during sleep as compared with waking state. For this purpose, we analysed recordings of intracranial EEG activity during sleep obtained directly from within the medial temporal lobe in patients with unilateral temporal lobe epilepsy. We found a general reduction of rhinal-hippocampal EEG coherence during sleep compared with waking state, which was most pronounced within the upper gamma bands (average decrease up to 56%). The observed coherence changes clearly differ from findings reported for surface EEG data and thus appear to be specific for the medial temporal lobe. The decrease of rhinal-hippocampal EEG coherence from waking state towards sleep may yield an electrophysiological explanation for the sleep-related deficiency of declarative memory.
机译：与唤醒状态相比，声明式记忆的不足是睡眠的一个经常被忽视的特征。在这里，我们调查了睡眠过程中与醒着状态相比，鼻-海马相干性（声明性记忆形成的电生理相关性）是否发生了显着变化。为此，我们分析了单侧颞叶癫痫患者直接从内侧颞叶内获得的睡眠期间颅内脑电活动的记录。我们发现，与清醒状态相比，睡眠过程中鼻-海马脑电图的连贯性总体下降，这在较高的伽马谱带内最为明显（平均下降达56％）。观察到的相干性变化明显不同于针对表面EEG数据报告的发现，因此似乎对内侧颞叶具有特异性。从醒着状态到睡眠期间，鼻-海马脑电图一致性的降低可能为与睡眠有关的声明性记忆不足提供电生理学解释。

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