3D Curvature of Medial Gastrocnemius (MG) Muscle Fibers Tracked from Diffusion Tensor Images (DTI): Age Related Differences in 3D fiber curvature.
Yanjie Xue1, Usha Sinha1, Vadim Malis2, Robert Csapo3, and Shantanu Sinha3
1Physics, San Diego State University, San Diego, CA, United States, 2Physics, University of California at San Diego, San Diego, CA, United States, 3Radiology, University of California at San Diego, San Diego, CA, United States
Muscle fiber curvature influences muscle
function but 3D curvature of the MG remains unexplored. This study determines 3D fiber curvature from
young and old cohorts from MG fibers tracked using DTI data. The fiber coordinates are fit to a 2nd
or 3rd order polynomial before extracting curvature using the Frenet–Serret relationship. The order of the polynomial affects curvature
values and the choice may depend on muscle fiber shape. Regional curvature changes were significant
between distal and central in the deep, middle and superficial compartments. No significant changes were seen in the
curvature between young and old subjects
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