Disentangling components of sensory-motor synchronization in surface EEG

Extracting periodicities in rhythmic stimuli is an important property of the sensory system, illustrated for example in the emergence of beat and meter perception in music. Moreover, the periodic entertain- ment to rhythms is strongly related to the motor system. In this study, we used the EEG to explore the neural activity elicited by the synchronization of a strictly periodic, isochronous, motor action to non-isochronous sensory input, in both auditory and visual modalities. Preliminary results show a modulation of the neural entertainment to the sensory input, for both auditory and visual conditions, in the movement condition compared to conditions in which the participant was not performing any motor activity. Further testing will allow us to study whether this modulation occurs specifically in sensory cortexes, or whether it requires broader sensory-motor neural network.