2026-06-02 オックスフォード大学
＜関連情報＞
- https://www.ox.ac.uk/news/2026-06-02-new-study-shows-the-brain-uses-brief-slow-rhythms-to-organise-how-memories-are
- https://www.cell.com/neuron/fulltext/S0896-6273(26)00375-2
学習によって誘発される低周波振動構造が、ヒト内側側頭葉全体におけるオフライン再活性化のための集団活動のペースを調整する A learning-evoked slow-oscillatory architecture paces population activity for offline reactivation across the human medial temporal lobe
Adrien A. Causse ∙ Jonathan Curot ∙ Vítor Lopes-dos-Santos ∙ … ∙ Tim Denison ∙ Leila Reddy ∙ David Dupret
Neuron Published:June 1, 2026
DOI:https://doi.org/10.1016/j.neuron.2026.05.004
Graphical abstract
Highlights
- Learning elicits transient 2-Hz slow-oscillatory bursts in the human hippocampus
- These bursts pace neuronal spiking and synchronize gamma activity across the MTL
- Burst-structured coactivity motifs are reactivated in post-learning ripples
- Post-learning reactivation strength predicts subsequent memory recall
Summary
Memory processing requires coordinated engagement of neuronal populations across brain networks and over time. How such coordination is organized in the human medial temporal lobe (MTL) remains unclear. Here, we show that MTL population activity is dynamically structured by a transient slow-oscillatory architecture that emerges during learning to promote offline consolidation and later recall. Using intracranial recordings that combine single-neuron spiking activity and local field potentials in human participants, we find that mnemonic engagement elicits on-demand slow-oscillatory bursts in the hippocampus. These hippocampal bursts synchronize gamma-band patterns across MTL regions, defining discrete coordination events that pace cross-regional coactivity motifs during learning. These learning-evoked population motifs are selectively reactivated during hippocampal ripples in post-learning rest, and the strength of their reactivation predicts subsequent recall accuracy. Together, these findings identify a multi-scale coordination mechanism that links distributed population activity across learning, consolidation, and recall in humans.
