Transmission of Musculotendon Forces to the Index Finger

This chapter reviews work completed by the authors and others to examine the mechanisms of musculotendon force transmission to the index finger and, ultimately, to generation of desired force at or movement of the fingertip. Specifically we examined the roles of finger posture, passive joint impedance, anatomical pulleys, and the extensor hood in mapping muscle forces to finger dynamics. Results from in vivo and in vitro experiments, as well as from biomechanical modeling of the musculotendon structure of the index finger, are provided. These findings can inform both the study of motor control of the hand and the potential design of robotic end-effectors.

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