Beta and gamma rhythms in human auditory cortex during musical beat processing.
We examined beta- (approximately 20 Hz) and gamma- (approximately 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 beta activity decreased after each tone, followed by an increase, thus forming a periodic modulation synchronized with the stimulus. The beta decrease was absent after omissions. In contrast, gamma-band activity showed a peak after tone and omission, suggesting underlying endogenous anticipatory processes. We propose that auditory beta and gamma oscillations have different roles in musical beat encoding and auditory-motor interaction.
Fujioka
Takako
T
Rotman Research Institute, Baycrest, University of Toronto, Toronto, Ontario, Canada. tfujioka@rotman-baycrest.on.ca
Trainor
Laurel J
LJ
Large
Edward W
EW
Ross
Bernhard
B
D000161:Acoustic Stimulation; D001303:Auditory Cortex / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology*; D006801:Humans; D015225:Magnetoencephalography; D009146:Music; D010507:Periodicity; D055815:Young Adult