Neuralgic amyotrophy with hourglass-like constrictions: A case report

Table 1 Results of nerve conduction study

Nerve		Stimulation site	Latency (ms)	Amplitude (mV)	Nerve conduction velocity (m/s)
Motor	Rt radial (EIP recording)	Forearm	2.9	6.1	56.0
		Lateral brachium	6.3	5.9
	Lt radial (EIP recording)	Forearm	2.7	5.6	53.8
		Lateral brachium	6.0	5.0
	Rt musculocutaneous (biceps recording)	Erb’s Pt	5.5	8.7
	Lt musculocutaneous (biceps recording)	Erb’s Pt	5.0	2.0
	Rt axillary (deltoid recording)	Erb’s Pt	3.5	11.2
	Lt axillary (deltoid recording)	Erb’s Pt	3.7	7.0
Sensory	Rt superficial radial	Forearm	3.0	26.1	40.3
	Lt superficial radial	Forearm	2.9	20.8	40.9
	Rt lateral antebrachial cutaneous	Elbow	1.7	18.5	42.0
	Lt lateral antebrachial cutaneous	Elbow	2.1	9.6	33.6
	Rt medial antebrachial cutaneous	Elbow	2.3	17.5	42.9
	Lt medial antebrachial cutaneous	Elbow	2.2	15.8	46.2

Rt: Right; Lt: Left; EIP: Extensor incidis proprius.