This is challenging, because movement of the residual limb with respect to the socket creates movement artifact in EMG signals and can cause chafing or pressure sores at electrode contact points ...

"Portable electronic device users have shown increasing interest in biometric tracking," explains the patent. "Biometric sensors often need to be in close or even direct contact with the skin to ...

As ever, the patent's almost 11,000 words are about making this process work, rather than what can then be done once an electrode has sensed a certain movement. "To detect the EMG signals ...