Napping to renew learning capacity: enhanced encoding after stimulation of sleep slow oscillations

被引:134
作者
Antonenko, Daria [1 ,2 ]
Diekelmann, Susanne [1 ,3 ]
Olsen, Cathrin [1 ]
Born, Jan [1 ,3 ]
Moelle, Matthias [1 ,3 ]
机构
[1] Med Univ Lubeck, Dept Neuroendocrinol, D-23538 Lubeck, Germany
[2] Charite, Dept Neurol, D-13353 Berlin, Germany
[3] Univ Tubingen, Dept Med Psychol & Behav Neurobiol, Tubingen, Germany
关键词
hippocampus; humans; memory; slow wave activity; transcranial electrical stimulation; RECOGNITION MEMORY; SYNAPTIC PLASTICITY; ITEM RECOGNITION; IN-VIVO; SPINDLES; CONSOLIDATION; NETWORKS; PATIENT; MECHANISMS; RESOLUTION;
D O I
10.1111/ejn.12118
中图分类号
Q189 [神经科学];
学科分类号
071006 [神经生物学];
摘要
As well as consolidating memory, sleep has been proposed to serve a second important function for memory, i.e. to free capacities for the learning of new information during succeeding wakefulness. The slow wave activity (SWA) that is a hallmark of slow wave sleep could be involved in both functions. Here, we aimed to demonstrate a causative role for SWA in enhancing the capacity for encoding of information during subsequent wakefulness, using transcranial slow oscillation stimulation (tSOS) oscillating at 0.75Hz to induce SWA in healthy humans during an afternoon nap. Encoding following the nap was tested for hippocampus-dependent declarative materials (pictures, word pairs, and word lists) and procedural skills (finger sequence tapping). As compared with a sham stimulation control condition, tSOS during the nap enhanced SWA and significantly improved subsequent encoding on all three declarative tasks (picture recognition, cued recall of word pairs, and free recall of word lists), whereas procedural finger sequence tapping skill was not affected. Our results indicate that sleep SWA enhances the capacity for encoding of declarative materials, possibly by down-scaling hippocampal synaptic networks that were potentiated towards saturation during the preceding period of wakefulness.
引用
收藏
页码:1142 / 1151
页数:10
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