Cortical delta oscillations during slow-wave sleep support declarative memory consolidation¶

Claim · All claims
Evidence · 1 study (2 entries) · review r2 · q2
Currency · newest study 2017 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Sleep duration in SWS and the coherence of delta oscillations positively correlate with memory retention, and stimulation that strengthens cortical delta boosts retention. → Drew B. Headley and Denis Paré 2017 q2 i? Delta oscillations during SWS may consolidate memory by structuring reactivation of experience-related ensembles in cortex, striatum, and hippocampus, partly initiated by hippocampal sharp-wave ripples. → Drew B. Headley and Denis Paré 2017 (2)

Evidence¶

Drew B. Headley and Denis Paré 2017¶

Drew B. Headley and Denis Paré. (2017). Common oscillatory mechanisms across multiple memory systems. npj Science of Learning 2:1. https://doi.org/10.1038/s41539-016-0001-2

q2 · i? · review · r2

The review reports human sleep studies in which "the duration of SWS" and "the coherence of its delta oscillations" positively correlate with retention, and cites transcranial stimulation boosting delta as boosting retention. No effect sizes are printed.

"Both the duration of SWS 107 and the coherence of its delta oscillations 108 positively correlate with memory retention."

Drew B. Headley and Denis Paré 2017 (2)¶

Drew B. Headley and Denis Paré. (2017). Common oscillatory mechanisms across multiple memory systems. npj Science of Learning 2:1. https://doi.org/10.1038/s41539-016-0001-2

q2 · i? · review · r2

The review synthesizes rodent reactivation findings: cortical and striatal task-related units are preferentially reactivated during SWS upstates, and hippocampal SWRs occur at upstate onset, reactivating waking activity patterns. The mechanism is stated as a possibility, not a tested causal result.

"Thus, delta oscillations during SWS may enhance memory consolidation by structuring the reactivation of experience-related neuronal ensembles in the cortex, striatum, and hippocampus."

Discussion¶

Related Claims¶

• Auditory cueing during NREM sleep elevates slow wave and spindle power relative to no stimulation, with effects concentrated in frontal and central regions — related
• Closed-loop auditory stimulation of slow oscillations and spindles evokes significant neurophysiological responses compared to sham in healthy young adults. — related
• In the personalized TMR group, memory improvement for challenging items correlates positively with SW-spindle coupling (r = 0.70), but no such correlation appears in the All condition or other groups — related
• The number of slow oscillations during sleep is positively correlated with attractiveness ratings of faces associated with cued names but not uncued names — related
• Closed-loop TMR timed to the slow-oscillation up-state improves memory consolidation relative to down-state cueing, though direct up-vs-down comparisons yield mixed results — related
• Hippocampal sharp-wave ripples during SWS and waking support memory consolidation and spatial task performance — related