Neuralgic amyotrophy with hourglass-like constrictions: A case report

Table 2 Results of needle electromyography

Muscle	Insertional activity	Denervation potentials		Polyphasic motor unit action potentials	Interference pattern
		Fibrillation potentials	Positive sharp waves
Lt deltoid	Increased	2+	3+	-	Single unit
Lt biceps brachii	Increased	2+	3+	-	Single unit
Lt brachioradialis	Increased	1+	2+	-	Marked reduced
Lt triceps brachii	Normal	-	-	-	Full
Lt flexor carpi radialis	Normal	-	-	-	Full
Lt extensor digitorum communis	Normal	-	-	-	Full
Lt first dorsal interosseous	Normal	-	-	-	Full
Lt abductor pollicis brevis	Normal	-	-	-	Full
Lt pronator quadratus	Normal	-	-	-	Full
Lt infraspinatus	Increased	2+	3+	-	Single unit
Lt rhomboid major	Increased	1+	2+	-	Marked reduced
Lt serratus anterior	Normal	-	-	-	Full
Lt cervical paraspinalis	Increased	1+	2+

Lt: Left.