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Abstract #3837

Voluntary action rhythmically modulates 7T BOLD visual responses in primary visual cortex

Maria Concetta Morrone1, Alessandro Benedetto1, Mauro Costagli2, Michela Tosetti2, and Paola Binda1
1Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy, 2IRCCS Stella Maris, Calambrone, Pisa, Italy

Behavioral visual sensitivity modulates rhythmically in synchrony with the onset of a voluntary action. Using 7T fMRI, we demonstrate similar oscillations of primary visual cortex (V1) BOLD responses to brief visual stimuli presented at different delays from the onset of an action. The oscillations are limited to the stimulated V1 region and not to peripheral V1 (which responds to the motor action). The peak responses of V1 BOLD activity are functionally connected to primary motor cortex, suggesting that motor cortex drives the rhythmic oscillation of V1. These results support the suggestion of a possible role of oscillations for visuo-motor coordination.

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