Electrophysiological study of the bulbocavernosus reflex: Normative data

Giuseppe Granata, Luca Padua, Fabiana Rossi, Paola de Franco, Daniele Coraci, Vincenzo Rossi

Research output: Contribution to journalArticlepeer-review

Abstract

In the clinical setting the bulbocavernosus reflex (BCR) is elicited by squeezing the glans penis and digitally palpating the contraction of the bulbocavernosus (BC) muscle. In neurophysiology the BCR is obtained by stimulating the dorsal nerve of the penis or clitoris and by recording the response from BC muscle and it should be performed in selected patients with suspected urinary, bowel, or sexual neurogenic dysfunction. The BCR is considered one of the sacral neurophysiological tests of the greatest clinical utility. Previous normative data were obtained on small samples. The aim of this study was to determine normative values for the BCR in a large sample of men. We studied a large population (105 men; mean age 53 years, range 19-73 years) without central or peripheral neurological diseases. In each subject the sacral reflex was elicited by electrical stimulation of the base of the dorsum penis and recorded using a surface electrode from the BC muscle. We recorded the latency, calculated at onset, and the maximal amplitude of response, calculated peak to peak. We were able to detect the BCR in all the men. No correlation between BCR latency and age was found (r=0.136; p=0.160). The mean onset latency value was 33.0±4.85 ms (mean±2SD, range 26.8-39.4). The mean amplitude value was 16.53±12.21 μV (mean±2SD, range 4.2-43.6). Our normative data on the BCR were similar to previously published data.

Original languageEnglish
Pages (from-to)293-295
Number of pages3
JournalFunctional Neurology
Volume28
Issue number4
Publication statusPublished - 2014

Keywords

  • Bulbocavernosus reflex
  • Normative data
  • Sacral reflex testing

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Fingerprint

Dive into the research topics of 'Electrophysiological study of the bulbocavernosus reflex: Normative data'. Together they form a unique fingerprint.

Cite this