Complete recovery of herpes zoster radiculopathy based on electrodiagnostic study: A case report

Table 1 Initial needle electromyographic study summary

Muscle right	IA	Spontaneous activity		MUAP			Recruitment pattern
		Fibs	Psw	Amp	Dur	Poly
Abductor pollicis brevis	N	-	-	N	N	-	N
Flexor carpi radialis	Incr	-	-	N	N	-	N
Flexor carpi ulnaris	N	-	-	N	N	-	N
Extensor carpi radialis longus	N	-	-	N	N	-	N
Biceps	Incr	-	-	N	N	-	R
Triceps	N	-	-	N	N	-	N
Deltoid	N	1 +	2 +	N	> 12 ms	1 +	R
Brachialis	Incr	-	-	N	N	-	R
Teres minor	N	2 +	2 +	N	N	-	N
Infraspinatus	N	3 +	3 +	N	N	-	R
1st dorsal interosseous	N	-	-	N	N	-	N
Trapezius	N	-	-	N	N	-	N
Cervical paraspinalis (C5/6)	Incr	-	-	N	N	-	N

Amp: Amplitude; Dur: Duration; Fibs: Fibrillation; IA: Insertional activity; Incr: Increased; MUAP: Motor unit action potential; N: Normal; Poly: Polyphasic; Psw: Positive sharp wave; R: Reduced.

Table 2 Initial nerve conduction study summary

		Nerve	Stimulation	Recording site	Onset latency, ms	Peak latency, ms	Peak amplitude, mV
Motor
	Right	Axillary	Erb’s	Deltoid	5.21	8.3	4.91
		Suprascapular	Erb’s	Infraspinatus	2.3	9.4	3.2
		Musculocutaneous	Erb’s	Biceps	4.2	7.1	5.1
		Median	Wrist/elbow	APB	4.0/7.4	6.8/10.6	6.7/6.6
		Radial	Elbow/axilla	EIP	3.2/4.6	5.4/7.2	7.3/7.4
	Left	Axillary	Erb’s	Deltoid	3.6	5.4	6.4
		Suprascapular	Erb’s	Infraspinatus	2.2	8.3	3.4
		Musculocutaneous	Erb’s	Biceps	3.8	6.3	5.7
Sensory							Peak amplitude (μV)
	Right	LABC	Elbow	Forearm	1.7	2.5	25.8
		MABC	Elbow	Forearm	2.0	2.7	15.1
		Median	Palm/wrist	3rd digit	1.0/3.2	1.8/4.11	68.1/45.4
	Left	Median	Palm/wrist	3rd digit	1.1/3.2	1.8/4.11	101/54.8

¹Abnormal findings. APB: Abductor pollicis brevis; EIP: Extensor indicis proprius; LABC: Lateral antebrachial cutaneous; MABC: Medial antebrachial cutaneous.

Table 3 Follow-up needle electromyographic study summary

Muscle right	IA	Spontaneous activity		MUAP			Recruitment pattern
		Fibs	Psw	Amp	Dur	Poly
Flexor carpi radialis	N	0	0	N	N	N	N
Biceps	N	0	0	N	N	N	N
Triceps	N	0	0	N	N	N	N
Deltoid	N	0	0	N	N	N	N
Brachialis	N	0	0	N	N	N	N
Teres minor	N	0	0	N	N	N	N
Infraspinatus	N	0	0	N	N	N	N
Cervical paraspinalis (C5/6)	N	0	0	N	N	N	N

Amp: Amplitude; Dur: Duration; Fibs: Fibrillation; IA: Insertional activity; MUAP: Motor unit action potential; N: Normal; Poly: Polyphasic; Psw: Positive sharp wave.