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Table 3 The neurophysiological score (NPS) and its electromyographic pattern

From: Unilateral versus bilateral thyroarytenoid Botulinum toxin injections in adductor spasmodic dysphonia: a prospective study

NPS Electromyographic pattern
0 No motor activity
1 No local motor unit activity, few distant motor units
2 No local motor unit activity, moderate distant motor units
3 No local motor unit activity, abundant distant motor units
4 Occasional local activity, abundant distal motor units
5 Few low amplitude low interference pattern local field motor unit activity. moderate distal motor units
6 Moderate low amplitude low interference pattern local field motor unit activity, few distal motor units
7 Abundant low amplitude low interference pattern local field motor unit activity, no distal motor units
8 Half amplitude half interference pattern local field motor unit activity, no distal motor units
9 Near full amplitude near full interference pattern local field motor unit activity, no distal motor units
10 Full amplitude, full interference pattern local field motor unit activity, no distal motor units