Beta and Gamma Rhythms in Human Auditory Cortex during Musical Beat Processing
We examined ?- (?20 Hz) and ?- (?40 Hz) band activity in auditory cortices by means of magnetoencephalography (MEG) during passive listening to a regular musical beat with occasional omission of single tones. The ? activity decreased after each tone, followed by an increase, thus forming a periodic modulation synchronized with the stimulus. The ? decrease was absent after omissions. In contrast, ?-band activity showed a peak after tone and omission, suggesting underlying endogenous anticipatory processes. We propose that auditory ? and ? oscillations have different roles in musical beat encoding and auditorymotor interaction.
musical beat magnetoencephalography auditorymotor interaction neural oscillation event-related desynchronization (erd)