Grasps under Artificially-limited Thumb’s Joint Range of Motion –Posture Analysis with ROM Boundary and Muscle Loads–

This paper proposed a method to clarify the features of grasping styles of ROM-limited hands. We measured the contact regions and joint angles of grasping by a ROM-limited hand. The joint angles were analyzed with respect to ROM boundary. Muscle loads of grasps were also estimated. Grasping styles finally selected by the ROM-limited hand tend to use side region of the thumb. In the grasping styles finally selected by the ROM-limited hand, ROM-limited joints tend to be farther from ROM boundary. In addition, the influence of muscle loads is not confirmed.