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Abstract #2149

Probing arm muscle structure underlying motor impairment in children with cerebral palsy using DTI tractography

Divya Joshi1,2, Alexandra Hruby1,2, Julius PA Dewald1,2,3, and Carson Ingo2,4
1Department of Biomedical Engineering, Northwestern University, Evanston, IL, United States, 2Department of Physical Therapy and Human Movement Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, United States, 3Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, United States, 4Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States

Synopsis

Keywords: Muscle, Diffusion Tensor Imaging, Cerebral Palsy

Individuals with cerebral palsy (CP) exhibit musculoskeletal maladaptations that have a profound impact on wrist and hand function, yet there is little understanding regarding underlying arm muscle structural changes. We implemented DTI to estimate in vivo muscle architecture of a forearm flexor muscle in both paretic and non-paretic arms of children with hemiparetic CP (n=5). Bone length, muscle size, fascicle lengths, and MD decreased while fascicle curvature increased in the paretic limb. Interlimb differences in fascicle length and curvature were correlated with interlimb differences in MD. We show that DTI is effective at capturing forearm muscle architecture changes in CP.

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