Steady-state evoked potentials distinguish brain mechanisms of self-paced versus synchronization finger tapping

De Pretto, Michael (University of Geneva, Switzerland ; University of Fribourg, Switzerland ; University of Edinburgh, UK) ; Deiber, Marie-Pierre (University Hospitals of Geneva, Switzerland ; NCCR Synapsy, Geneva, Switzerland) ; James, Clara Eline (University of Geneva, Switzerland ; Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland)

Sensorimotor synchronization (SMS) requires aligning motor actions to external events and represents a core part of both musical and dance performances. In the current study, to isolate the brain mechanisms involved in synchronizing finger tapping with a musical beat, we compared SMS to pure self-paced finger tapping and listen-only conditions at different tempi. We analyzed EEG data using frequency domain steady-state evoked potentials (SSEPs) to identify sustained electrophysiological brain activity during repetitive tasks. Behavioral results revealed different timing modes between SMS and self-paced finger tapping, associated with distinct scalp topographies, thus suggesting different underlying brain sources. After subtraction of the listen-only brain activity, SMS was compared to self-paced finger tapping. Resulting source estimations showed stronger activation of the left inferior frontal gyrus during SMS, and stronger activation of the bilateral inferior parietal lobule during self-paced finger tapping. These results point to the left inferior frontal gyrus as a pivot for perception–action coupling. We discuss our findings in the context of the ongoing debate about SSEPs interpretation given the variety of brain events contributing to SSEPs and similar EEG frequency responses.


Mots-clés:
Type d'article:
scientifique
Faculté:
Santé
Ecole:
HEdS - Genève
Institut:
Aucun institut
Classification:
Santé
Date:
2018-10
Pagination:
16 p.
Publié dans:
Human Movement Science
Numérotation (vol. no.):
2018, vol. 61, pp. 151-166
DOI:
ISSN:
0167-9457
Le document apparaît dans:

Note: The status of this file is: restricted


 Notice créée le 2019-02-06, modifiée le 2019-10-07

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