Atypical course of the rare accessory extensor carpi radialis muscle
Khaledpour, C.; Schindelmeiser, J.
Journal of Anatomy 184: 161-163
1994
ISSN/ISBN: 0021-8782 PMID: 8157488 Document Number: 428574
The description of a bilaterally well developed, bicipital and bipennate accessory extensor carpi radialis muscle is reported. The muscle arose between the origins of the long and short radial carpal extensor muscles and inserted by 2 tendons into the 1st 2 metacarpal bones. The ulnar tendinous insertion was simultaneously the origin of abductor pollicis brevis. Both heads of the accessory extensor carpi radialis muscle were innervated by a branch of the deep branch of the radial nerve. The present observation supplements our knowledge on variations in the antebrachial and carpal regions, which are important in hand surgery.