Coupling of gamma band activity to sleep spindle oscillations – a combined EEG/MEG study

Sleep spindles are crucial to memory consolidation. Cortical gamma oscillations (30–100 Hz) are considered to reflect processing of memory in local cortical networks. The temporal and regulatory relationship between spindles and gamma activity might therefore provide clues into how sleep strengthens cortical memory representations. Here, combining EEG with MEG recordings during sleep in healthy humans (n = 12), we investigated the temporal...