He would also wear an elbow pad, and that posed a bit of a problem during rehab because he couldn't find one that quite worked with the forearm pad.

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Additionally, a sensory pad was applied onto our forearm's medial cutaneous nerve (around the elbow area) to pick up our muscular nerve signal -- similarly, Cyberdyne's lower-body exosuit requires two sensors on each leg.

ENGADGET: Cyberdyne HAL robotic arm hands-on (video) Hands-on