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Abstract #3037

Comparative analysis of cortical activation associated to voluntary and electrically-evoked contractions

Jennifer Wegrzyk 1 , Jean-Philippe Ranjeva 1 , Sylviane Confort-Gouny 1 , Hlne Boudinet 1,2 , David Bendahan 1 , and Julien Gondin 1

1 Aix-Marseille Universit, CNRS, CRMBM (Centre de Rsonance Magntique Biologique et Mdicale) UMR 7339, Marseille, France, 2 CEMEREM, APHM, Ple Imagerie, Marseille, France

In this BOLD fMRI study we illustrated that cerebral activation patterns in healthy subjects were significantly different between two neuromuscular stimulation protocols (using either conventional or wide-pulse, high-frequency parameters) and voluntary contractions. Plantar flexions were performed under isometric conditions at a given submaximal intensity level inside a 1.5T scanner. The results show that the brain activation was higher for wide-pulse, high-frequency as compared to conventional neuromuscular electrostimulation and closer to the physiological brain activation pattern of voluntary contractions.

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