Motor unit number estimation of facial muscles using the M Scan‐Fit method

Introduction M Scan‐Fit, an automated method for motor unit number estimation (MUNE), was assessed in muscles innervated by the facial nerve. Methods Healthy volunteers were recruited. M Scans were recorded twice from nasalis and depressor anguli oris (DAO) muscles, and then fitted to a probabilistic model. Results Twenty‐one subjects were evaluated; 38% were females and 62% were males, with a mean age of 34.71 years. The average number of MUs...