Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Ulnar Sensory-motor Amplitude Ratio: A New Tool To Differentiate Ganglionopathy From Polyneuropathy.
Author: Garcia, Raphael Ubirajara
Ricardo, João Adilson Gama
Horta, Cassiana Abreu
Garibaldi, Solange Garcia
Nucci, Anamarli
França, Marcondes Cavalcante
Abstract: The objective of this study was to evaluate if the ratio of ulnar sensory nerve action potential (SNAP) over compound muscle action potential (CMAP) amplitudes (USMAR) would help in the distinction between ganglionopathy (GNP) and polyneuropathy (PNP). We reviewed the nerve conductions studies and electromyography (EMG) of 18 GNP patients, 33 diabetic PNP patients and 56 controls. GNP was defined by simultaneous nerve conduction studies (NCS) and magnetic resonance imaging (MRI) abnormalities. PNP was defined by usual clinical and NCS criteria. We used ANOVA with post-hoc Tukey test and ROC curve analysis to compare ulnar SNAP and CMAP, as well as USMAR in the groups. Ulnar CMAP amplitudes were similar between GNP x PNP x Controls (p=0.253), but ulnar SNAP amplitudes (1.6±3.2 x 11.9±9.1 × 45.7±24.7) and USMAR values (0.3±0.3 × 1.5±0.9 × 4.6±2.2) were significantly different. A USMAR threshold of 0.71 was able to differentiate GNP and PNP (94.4% sensitivity and 90.9% specificity). USMAR is a practical and reliable tool for the differentiation between GNP and PNP.
Subject: Action Potentials
Analysis Of Variance
Case-control Studies
Diabetic Neuropathies
Diagnosis, Differential
Middle Aged
Neural Conduction
Roc Curve
Reproducibility Of Results
Ulnar Nerve
Citation: Arquivos De Neuro-psiquiatria. v. 71, n. 7, p. 465-9, 2013-Jul.
Rights: aberto
Identifier DOI: 10.1590/0004-282X20130063
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
pmed_23857623.pdf547.19 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.