Surface electromyography (sEMG) measures the electrical activity muscles produce when
they contract, using sensors that sit on your skin. No needles, no surgery. Because the
signal appears the moment you intend to move, even small or partial movements can
drive a cursor, trigger a click, or stand in for a key press.
That makes sEMG a powerful, low-friction input channel for people for whom a standard
mouse and keyboard don't work.
