Spectral fingerprints or spectral tilt Evidence for distinct oscillatory signatures of memory formation

" Both, MEG and iEEG data, show that decreases in alpha/beta power specifically predicted the encoding of words, but not faces, whereas increases in gamma power and decreases in theta power predicted memory formation irrespective of material. Critically, these different oscillatory signatures of memory encoding were evident in different brain regions. Moreover, high frequency gamma power increases occurred significantly earlier compared to low frequency theta power decreases. These results speak against a 'spectral tilt' and demonstrate that brain oscillations in different frequency bands serve different functions for memory encoding."

Last modified on 29-Aug-18

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