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2016 ; 5
(ä): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Rotating waves during human sleep spindles organize global patterns of activity
that repeat precisely through the night
#MMPMID27855061
Muller L
; Piantoni G
; Koller D
; Cash SS
; Halgren E
; Sejnowski TJ
Elife
2016[Nov]; 5
(ä): ä PMID27855061
show ga
During sleep, the thalamus generates a characteristic pattern of transient, 11-15
Hz sleep spindle oscillations, which synchronize the cortex through large-scale
thalamocortical loops. Spindles have been increasingly demonstrated to be
critical for sleep-dependent consolidation of memory, but the specific neural
mechanism for this process remains unclear. We show here that cortical spindles
are spatiotemporally organized into circular wave-like patterns, organizing
neuronal activity over tens of milliseconds, within the timescale for storing
memories in large-scale networks across the cortex via spike-time dependent
plasticity. These circular patterns repeat over hours of sleep with millisecond
temporal precision, allowing reinforcement of the activity patterns through
hundreds of reverberations. These results provide a novel mechanistic account for
how global sleep oscillations and synaptic plasticity could strengthen networks
distributed across the cortex to store coherent and integrated memories.