Article: Biomechanical model of index finger dynamics

PURPOSE-The purpose of this study is to develop a dynamic model of the index finger for flexion-extension and abduction-adduction motion.

METHODOLOGY-The model takes into account all the tendons in the finger and relates to their varying moment arms during motion. A new set of moment arm coefficients and elongation equations is derived based on experimental measurements of previous studies. Constraint equations using variable coefficients are introduced into an optimization approach used to obtain the tendon forces for any given motion and external force.

RESULTS-The model and optimization approach are tested with data from a rapid punch experiment as well as a hypothetical disc rotation. ...

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