Fig. 3

Intraoperative image of function-preserving surgery with electroneuromyography in real time. A An electrostimulation pen (green arrow) stimulates a structure that raised doubts about its nervous origin (white asterisk). B During monitoring, the muscular contraction of the deltoid was detected, triggering waves (white arrows), proving that the structure in question was the axillary nerve and, therefore, should not be sectioned