Use of collision tests to identify physiological differences between the median and ulnar nerves

Muscle Nerve. 2019 Apr;59(4):470-474. doi: 10.1002/mus.26428. Epub 2019 Feb 11.

Abstract

Introduction: Median and ulnar nerves are used in comparative electrophysiological studies. We analyzed the conduction values in these hand nerves in healthy volunteers to find any physiological differences between them.

Methods: We performed standard conduction studies and conduction velocity distribution (CVD) tests with estimation of 3 quartiles in 31 healthy right-handed volunteers (17 women, 14 men) with a mean age of 44.8 ± 15.5 years.

Results: The conduction velocities in all quartiles of CVD tests were statistically faster in the ulnar nerve (P < 0.00001), with no differences in the spread of conduction values and no differences between sides. In the ulnar nerve, CVD velocities in all quartiles were faster in the female group (P < 0.05).

Discussion: The ulnar nerve has more fibers conducting with high velocities than does the median nerve. Electrophysiological comparisons between hand nerves must be performed carefully. Muscle Nerve 59:470-474, 2019.

Keywords: collision technique; conduction velocity; distribution; median nerve; nerve conduction study; physiology of nerve conduction; ulnar nerve.

MeSH terms

  • Adolescent
  • Adult
  • Electric Stimulation
  • Electrophysiological Phenomena
  • Female
  • Healthy Volunteers
  • Humans
  • Male
  • Median Nerve / physiology*
  • Middle Aged
  • Nerve Compression Syndromes / diagnosis
  • Neural Conduction
  • Sex Characteristics
  • Ulnar Nerve / physiology*
  • Young Adult