Abstract:
A new electric hand has been developed which integrates flexion/extension into an electric
hand, with no increase in length over standard-length electric or body-powered hands. The
development* has included a field trial with six wearers of the electric hand. All the wearers
were surveyed on the actual tasks they performed with the hand, including those utilizing
flexion/extension.
Electric Hands have typically operated with a single gripping mode, usually three-finger
tip prehension. Our attempt at this stage is to enhance function in the hand, but without adding
complexity to the gripping mechanism.
Passive and electric wrist rotation can add an important degree of freedom (DOF), but still
provides only one of the natural wrist’s three DOF. Additional degrees of freedom in the hand,
however, would offer the amputee broader function of course, but practicality dictates the
addition of a DOF without adding to the complexity of the hand.
