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Is triceps hypertrophy associated with ulnar nerve luxation?
Author(s) -
Michael Arwed E.,
Young Peter
Publication year - 2018
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.26183
Subject(s) - medicine , subluxation , ulnar nerve , muscle hypertrophy , epicondyle , anatomy , musculocutaneous nerve , ulnar neuropathy , median nerve , elbow , pathology , alternative medicine
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. Methods 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. Results 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. Discussion 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