[Electrodiagnostic prevalence of accessory peroneal nerve in admitted patients in Shohada hospital]

ABSTRACT

Accessory peroneal nerve [APN] is an anatomic variation which can disturb electrodiagnostic studies. This anomaly is detected when the response CMAP [Compound muscle action potential] of EDB [Extensor digitrum brevis] to peroneal nerve stimulation is measured smaller in distal when compared to proximal. In this study, we have assessed the prevalence of APN in a group of patients admitted to Shohada-Tajrish hospital. CMAP of DPN was measured by Neuro-Screen Toennis instrument. If no CMAP of EDB was detected in ankle, a record was obtained below lateral malleous and the presence of APN was confirmed when CMAP in distal was lesser than proximal. The study population included 143 females [62.7%] and 87 [17.9%] males with a mean age of 42.1 +/- 13.5 years. APN was detected in 28 patients, among whom 5 [17.9%] had bilateral APN. Sexual distribution of APN was the same, with half of the cases [14 patients] were females. The prevalence of APN was 12.2%. Approximately, 17.9% of cases were bilateral