In accordance with the invention apparatus is provided for monitoring the activity of a surgeon. The apparatus comprises a plurality of wireless sensing units for producing an output indicative of nerve stimulation. A receiver takes the output of the receiver units and produces at its output a plurality of signals each corresponding to the output of one of the plurality of wireless sensing units. An analyzer unit receives the plurality of signals each corresponding to the output of one of the plurality of wireless sensing units from the receiver. An indicator responds to the output of the analyzer unit.