Estimation of musculotendon kinematics in large musculoskeletal models using multidimensional B-splines.

ABSTRACT: We present a robust and computationally inexpensive method to estimate the lengths and three-dimensional moment arms for a large number of musculotendon actuators of the human lower limb. Using a musculoskeletal model of the lower extremity, a set of values was established for the length of each musculotendon actuator for different lower limb generalized coordinates (joint angles). A multidimensional spline function was then used to fit these data. Muscle moment arms were obtained by differentiating the musculotendon length spline function with respect to the generalized coordinate of interest. This new method was then compared to a previously used polynomial regression method. Compared to the polynomial regression method, the multidimensional spline method produced lower errors for estima

SUBMITTER: Sartori M 

PROVIDER: S-EPMC3264840 | biostudies-literature | 2012 Feb

REPOSITORIES: biostudies-literature