title: Palm to Finger Ulnar Sensory Nerve Conduction.
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.
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Davidowich
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Osvaldo J M
authors.initials: OJ
authors.lastname: Nascimento
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Marco
authors.initials: M
authors.lastname: Orsini
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Camila
authors.initials: C
authors.lastname: Pupe
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Bruno
authors.initials: B
authors.lastname: Pessoa
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Caroline
authors.initials: C
authors.lastname: Bittar
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Karina Lebeis
authors.initials: KL
authors.lastname: Pires
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Carlos
authors.initials: C
authors.lastname: Bruno
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Bruno Mattos
authors.initials: BM
authors.lastname: Coutinho
authors.affiliation: Antônio Pedro University Hospital, Fluminense Federal University , Niterói.
authors.forename: Olivia Gameiro
authors.initials: OG
authors.lastname: de Souza
authors.affiliation: Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University.
authors.forename: Pedro
authors.initials: P
authors.lastname: Ribeiro
authors.affiliation: Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University.
authors.forename: Bruna
authors.initials: B
authors.lastname: Velasques
authors.affiliation: Laboratório de Mapeamento Cerebral, Rio de Janeiro Federal University.
authors.forename: Juliana
authors.initials: J
authors.lastname: Bittencourt
authors.affiliation: Universidade Federal do Piaiu , Parnaiba, Brazil.
authors.forename: Silmar
authors.initials: S
authors.lastname: Teixeira
authors.affiliation: Universidade Federal do Piaiu , Parnaiba, Brazil.
authors.forename: Victor Hugo
authors.initials: VH
authors.lastname: Bastos
keywords: Ulnar nerve; nerve conduction; neuropathy; wrist