Palm to finger ulnar sensory nerve conduction

Neurology International

Karina Lebeis Pires¹  Bruno Mattos Coutinho¹  Osvaldo J.M. Nascimento¹  Bruno Pessoa¹  Eduardo Davidowich¹  Camila Pupe¹  Carlos Bruno¹  Olivia Gameiro de Souza¹  Caroline Bittar¹  Marco Orsini¹  Juliana Bittencourt²  Pedro Ribeiro²  Bruna Velasques²  Victor Hugo Bastos³  Silmar Teixeira³ 

[1] Antônio Pedro University Hospital, Fluminense Federal University, Niterói;Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University;Universidade Federal do Piaiu, Parnaiba;

关键词: Ulnar nerve;    wrist;    neuropathy;    nerve conduction;   

DOI  :  10.4081/ni.2015.6207

来源: DOAJ

【 摘 要 】

Ulnar neuropathy at the wrist (UNW) is rare, and always challenging to localize. To increase the sensitivity and specificity of the diagnosis of UNW many authors advocate the stimulation of the ulnar nerve (UN) in the segment of the wrist and palm. The focus of this paper is to present a modified and simplified technique of sensory nerve conduction (SNC) of the UN in the wrist and palm segments and demonstrate the validity of this technique in the study of five cases of type III UNW. The SNC of UN was performed antidromically with fifth finger ring recording electrodes. The UN was stimulated 14 cm proximal to the active electrode (the standard way) and 7 cm proximal to the active electrode. The normal data from amplitude and conduction velocity (CV) ratios between the palm to finger and wrist to finger segments were obtained. Normal amplitude ratio was 1.4 to 0.76. Normal CV ratio was 0.8 to 1.23.We found evidences of abnormal SNAP amplitude ratio or substantial slowing of UN sensory fibers across the wrist in 5 of the 5 patients with electrophysiological-definite type III UNW.

【 授权许可】

Unknown