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Abstract #1146

Estimating contraction of individual muscles during isometric wrist torque using multi-muscle MR elastography (MM-MRE)

Daniel Smith1, Andrea Zonnino1, Fabrizio Sergi1, and Curtis Johnson1
1University of Delaware, Newark, DE, United States

In this study, we propose to use a technique called MM-MRE to identify states of contraction of individual forearm muscles based on the measurement of muscle shear wave speed. Using a custom protocol and passive driver device, we scanned four subjects through 45 MRE scans each in three wrist positions during five torque application states. We found significant correlations between increased wave speed and higher applied torques, in both agonist and antagonist motions. The results indicate that MM-MRE is an effective measurement tool for analyzing the contractile state of individual forearm muscle during isometric contractions of the wrist joint.

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