Palm to finger ulnar sensory nerve conduction

• Main Authors: Eduardo Davidowich (Author), Osvaldo J.M. Nascimento (Author), Marco Orsini (Author), Camila Pupe (Author), Bruno Pessoa (Author), Caroline Bittar (Author), Karina Lebeis Pires (Author), Carlos Bruno (Author), Bruno Mattos Coutinho (Author), Olivia Gameiro de Souza (Author), Pedro Ribeiro (Author), Bruna Velasques (Author), Juliana Bittencourt (Author), Silmar Teixeira (Author), Victor Hugo Bastos (Author)
• Format: Book
• Published: MDPI AG, 2015-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

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.

Item Description

2035-8385
2035-8377
10.4081/ni.2015.6207