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Neurophysiological study of the radial nerve variant in the innervation of the dorsomedial surface of the hand
Author(s) -
Parra Silvia,
Orenga Jose V.,
Ghinea Alina D.,
Estarelles Maria J.,
Masoliver Angel,
Barreda Ines,
Puertas F. Javier
Publication year - 2018
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.26174
Subject(s) - radial nerve , anatomy , wrist , dorsum , medicine , stimulation , ulnar nerve , sensory system , sensory nerve , median nerve , nerve conduction velocity , free nerve ending , electroneuronography , neurophysiology , neuroscience , psychology , facial nerve , elbow , psychiatry
: Sensory innervation of the dorsomedial surface of the hand usually depends on the dorsal ulnar nerve (DUN). Innervation in this area by the superficial radial nerve (SRN) has been described as a normal variant. Methods : We studied 358 patients using nerve conduction of the DUN and SRN with dorsomedial recording. Each hand was classified into usual innervation (only DUN response), mixed variant (response of both nerves), or complete variant (only SRN response). Results : Mixed innervation was found in 14.2% of hands and complete innervation was found in 6.8% of hands, mostly unilaterally. No statistically significant differences were observed in age, sex, or clinical suspicion between usual and variant innervation. The potential amplitude after SRN stimulation was greater in the complete variant. Discussion : It is important to know the characteristics of this variant in order to avoid diagnostic errors and to prevent iatrogenic lesions in surgery performed on the dorsum of the wrist. Muscle Nerve 58 : 732–735, 2018