Journal of Rehabilitation Research & Development (JRRD)

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JRRD Volume 46, Number 8, 2009


JRRD at a Glance


Crossed four-bar mechanism for improved prosthetic grasp

Issa A. Ramirez, MS, et al.

Figure. Medical evacuation of battle-injured patients across three continents typically occurs within days from injury because of sophisticated trauma systems supported by robust training and educational initiatives.

Veterans with upper-limb amputations may benefit from this research. We described testing done on a standard prosthetic hook and a hook with adaptations aimed at im-proving grasp. These hooks were compared with each other and with a normal anatomical hand. The results show that, for untrained hook users, the hooks take 2 to 3 times longer than the anatomical hand to perform simple tasks; difficult tasks may require even more time. The results demonstrate the promise of the mechanical adaptation and the importance of a high-friction surface on the end of the hook.

Volume 46 Number 8, 2009
   Pages 1011 — 1020


View HTML  ¦  View PDF  ¦  Contents Vol. 46, No. 8