Electrophysiological study of posterior antebrachial cutaneous nerve in a sample of normal subjects

Abstract

BackgroundsPosterior antebrachial cutaneous nerve sensory conduction study is clinically essential for the assessment of its integrity and for the localization of radial nerve lesions. The aim of the study was to assess posterior antebrachial cutaneous nerve sensory antidromic conduction technique and to obtain normal reference values for different sensory nerve action potential parameters of this nerve among a sample of Egyptian population.ResultsThe current study included 120 upper limbs of 60 apparently healthy subjects [35 (58.3%) women]. Their mean age was 39.20 ± 11.95 years. The posterior antebrachial cutaneous nerve was recorded in all upper limbs (100%). The values (mean ± standard deviation) for the posterior antebrachial cutaneous nerve sensory nerve action potential onset latency were 2.05 ± 0.25 ms, peak latency was 2.63 ± 0.28 ms, conduction velocity was 60.50 ± 5.38 m/s, amplitude was 11.04 ± 4.26 μV, and inter-side sensory nerve action potential amplitude ratio was 0.69 ± 0.17. There were no statistically significant differences between men and women, as well as between right and left upper limbs regarding different posterior antebrachial cutaneous sensory nerve action potential parameters. There were no statistically significant correlations between participants’ age and anthropometric measures (i.e., height, weight, and body mass index) with different posterior antebrachial cutaneous nerve sensory nerve action potential parameters. There were no statistically significant adjusted effects of age, gender, and anthropometric measures on different posterior antebrachial cutaneous nerve sensory nerve action potential parameters in multiple linear regression analysis by controlling all other physiologic factors.ConclusionsThis research provides an applicable electrophysiological technique and normal reference values for the posterior antebrachial cutaneous nerve sensory conduction study.