Palm to finger ulnar sensory nerve conduction

  • Eduardo Davidowich Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Osvaldo J.M. Nascimento | osvaldo_nascimento@hotmail.com Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Marco Orsini Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Camila Pupe Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Bruno Pessoa Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Caroline Bittar Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Karina Lebeis Pires Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Carlos Bruno Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Bruno Mattos Coutinho Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Olivia Gameiro de Souza Antônio Pedro University Hospital, Fluminense Federal University, Niterói, Brazil.
  • Pedro Ribeiro Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University, Brazil.
  • Bruna Velasques Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University, Brazil.
  • Juliana Bittencourt Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University, Brazil.
  • Silmar Teixeira Universidade Federal do Piaiu, Parnaiba, Brazil.
  • Victor Hugo Bastos Universidade Federal do Piaiu, Parnaiba, Brazil.

Abstract

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.

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Published
2015-12-29
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Articles
Keywords:
Ulnar nerve, wrist, neuropathy, nerve conduction
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How to Cite
Davidowich, E., Nascimento, O. J., Orsini, M., Pupe, C., Pessoa, B., Bittar, C., Pires, K. L., Bruno, C., Coutinho, B. M., de Souza, O. G., Ribeiro, P., Velasques, B., Bittencourt, J., Teixeira, S., & Bastos, V. H. (2015). Palm to finger ulnar sensory nerve conduction. Neurology International, 7(3). https://doi.org/10.4081/ni.2015.6207