Abstract:
We have developed a new externally-powered, myoelectrically controlled partial hand
prosthesis that is suitable for fitting those persons with amputations at or more proximal to the
level of the metacarpophalangeal (MCP) joint. This hand mechanism is capable of reasonable
pinch forces (12 lbsf) and fast opening and closing (2 rads/sec). In a partial hand mechanism
there is very little space available for the drive mechanism if an aesthetic result is to be achieved
and any residual motion of the wrist is to be preserved. The challenge is to be able to fit all the
requisite mechanisms and electronics in the highly confined volume that remains after
accommodating the residual limb and still have reasonable performance.
