Voluntary control of a phantom limb.
Neuropsychologia August 1, 2015 E Walsh, C Long, P Haggard 13 citations
A person born without a left hand and arm (co-author CL) reported when she experienced the intention to press a key with her right hand or her phantom left hand. EEG recordings showed typical beta-band power reductions before actual right-hand movements and beta rebound afterward. When she prepared but then cancelled a movement, a left frontal increase in spectral power appeared near the time of the perceived intention to move. The same neural signatures of positive and inhibitory volition were present when she prepared and inhibited movements with her phantom left hand. These signals matched those previously reported in 14 healthy volunteers.