Abstract:
:How sleep influences brain plasticity is not known. In particular, why certain electroencephalographic (EEG) rhythms are linked to memory consolidation is poorly understood. Calcium activity in dendrites is known to be necessary for structural plasticity changes, but this has never been carefully examined during sleep. Here, we report that calcium activity in populations of neocortical dendrites is increased and synchronised during oscillations in the spindle range in naturally sleeping rodents. Remarkably, the same relationship is not found in cell bodies of the same neurons and throughout the cortical column. Spindles during sleep have been suggested to be important for brain development and plasticity. Our results provide evidence for a physiological link of spindles in the cortex specific to dendrites, the main site of synaptic plasticity.Different stages of sleep, marked by particular electroencephalographic (EEG) signatures, have been linked to memory consolidation, but underlying mechanisms are poorly understood. Here, the authors show that dendritic calcium synchronisation correlates with spindle-rich sleep phases.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Seibt J,Richard CJ,Sigl-Glöckner J,Takahashi N,Kaplan DI,Doron G,de Limoges D,Bocklisch C,Larkum MEdoi
10.1038/s41467-017-00735-wsubject
Has Abstractpub_date
2017-09-25 00:00:00pages
684issue
1issn
2041-1723pii
10.1038/s41467-017-00735-wjournal_volume
8pub_type
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