Is triceps hypertrophy associated with ulnar nerve luxation?

Muscle & Nerve
Arwed E Michael, Peter Young

Abstract

The mechanism of ulnar nerve luxation is unclear, but the triceps brachii muscle may be a contributing factor. Therefore, we explored whether hypertrophy of the triceps brachii muscle is more frequently accompanied by nerve luxation. In this investigation we used a cross-sectional design to study a group of amateur bodybuilders (n = 31) in a comparison with a group of age-matched healthy controls (n = 31). Triceps hypertrophy was determined clinically and sonographically. The position of the ulnar nerve in relation to the medial epicondyle was classified according to a graded (0-4) scale. In full flexion of 62 hypertrophic arms, 22 (35.5%) revealed subluxation and 27 (43.5%) complete luxation. In the controls, 21 (33.9%) demonstrated subluxation and 10 (16.1%) complete luxation. The higher frequency of ulnar nerve luxation in arms with hypertrophic triceps indicates that triceps muscle mass may be a factor contributing to ulnar nerve luxation. Muscle Nerve 58: 523-527, 2018.

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Citations

Mar 14, 2019·Journal of Ultrasound·Stacey M CornelsonNorman W Kettner
Jan 3, 2021·European Geriatric Medicine·Stany PerkisasAnne-Marie De Cock
Mar 16, 2021·Archives of Physical Medicine and Rehabilitation·Geoffrey FrostHeather Finlayson
Jun 23, 2021·PM & R : the Journal of Injury, Function, and Rehabilitation·Masashi KawabataKentaro Kamiya
Jul 25, 2021·Journal of Clinical Medicine·Keisuke TsukadaWataru Miyamoto

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