Fig. 2.

Result of decomposition of EMG signals during a 10% maximal voluntary contraction (MVC) contraction for a representative subject. In this case, 3 motor units were identified from C2 and 7 from C5. The action potentials from each of these motor units are identified from the intramuscular EMG recording (A). B: superimposed motor unit action potentials for 3 of the detected motor units. In many cases, not all the identified motor units were included in the analysis since not all were consistently active throughout the contraction. In this example, motor unit (MU)5 and MU10 from C5 were excluded from further analysis since they were active for short periods.