Bilateral musculocutaneous neuropathy: A case report

Table 1 Electrodiagnostic study: Nerve conduction study

Nerve conduction (sensory)	Recording site	Stimulation site	Peak latency (ms)	Amplitude (μV)	Distance (cm)	Conduction velocity (m/s)	Nerve conduction (motor)	Recording site	Stimulation site	Onset latency (ms)	Amplitude (mV)	Distance (cm)	Conduction velocity (m/s)
Right median	Index finger	Palm	1.65	49.9	7	60.9	Right median	APB	Wrist	2.80	8.4
		Wrist	2.90	54.8	7	63.6			Antecubital	6.25	8.3	22	63.8
Left median	Index finger	Palm	1.60	59.8	7	63.6	Left median	APB	Wrist	2.95	8.3
		Wrist	2.80	59.7	7	66.7			Antecubital	6.50	8.3	22	62.0
Right ulnar	Small finger	Wrist	2.70	44.0	13	63.4	Right ulnar	ADM	Wrist	2.05	8.3
Left ulnar	Small finger	Wrist	2.90	37.0	14	59.6			Below elbow	5.85	8.8	23	60.5
Right lateral antebrachial	Lateral forearm	12 cm proximal	2.40	13.5	11	57.9	Left ulnar	ADM	Wrist	2.15	5.8
Left lateral antebrachial	Lateral forearm	12 cm proximal	2.60	18.8	13	63.4			Below elbow	6.00	7.4	22	57.1
Right medial antebrachial	Medial forearm	12 cm proximal	2.30	12.6	11	66.7	Right ulnar	ADM	Wrist	2.25	8.2
Left medial antebrachial	Medial forearm	12 cm proximal	2.40	19.9	12	64.9	(Post-exercise)		Below elbow	5.95	8.4	23	62.2
							Left ulnar	ADM	Wrist	2.45	8.1
							(Post-exercise)		Below elbow	6.15	9.6	23	62.2
							Right axillary	Deltoid	Erb’s point	3.65	8.6
							Left axillary	Deltoid	Erb’s point	4.05	7.2
							Right musculocutaneous	Biceps	Erb’s point	4.25	2.4
							Left musculocutaneous	Biceps	Erb’s point	4.05	1.3

ADM: Abductor digiti minimi; APB: Abductor pollicis brevis. Bold text indicates abnormal findings.