Zac Vawter, a software engineer who lives in the Seattle area, already knew about advances in bionic technology when a motorcycle wreck led to the amputation of his right leg just above the knee in 2009.
As doctors at Harbor View Medical Center in Seattle battled for three days to try to save his leg, Vawter asked about the method that uses the mind to move a prosthetic limb. The technology had previously been used only in arms.
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