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Surg Radiol Anat. 2018 Sep;40(9):1001-1003. doi: 10.1007/s00276-018-2035-z. Epub 2018 Apr 30.

Accessory head of the extensor carpi radialis longus muscle merging with extensor carpi radialis brevis muscle.

Author information

1
Department of Anatomy, Keimyung University School of Medicine, 2800, Dalgubeoldaero, Dalseo-Gu, Daegu, Republic of Korea.
2
Department of Anatomy, Keimyung University School of Medicine, 2800, Dalgubeoldaero, Dalseo-Gu, Daegu, Republic of Korea. anato82@dsmc.or.kr.

Abstract

PURPOSE:

The retention and capture functions of hand can be achieved by the consistent manner work of the extensor and flexor muscles. Therefore, it is important to know variations of the extensor and flexor muscles.

METHODS:

During an educational dissection, accessory heads of the extensor carpi radialis longus muscle were found on the right side in a Korean cadaver.

RESULTS:

The extensor carpi radialis longus muscle was originated from the lateral supracondylar ridge of the humerus and trifurcated into three heads as lateral, intermediated, and medial heads. The lateral and intermediated heads merged and inserted to the base of the second metacarpal bone. However, medial head of extensor carpi radialis longus muscle was merged with the extensor carpi radialis brevis muscle.

CONCLUSIONS:

Knowledge of the variations of the ECRL is important for surgeons because the presence of the ECRL variations increases the incidence of iatrogenic injuries during surgery and invasive procedures.

KEYWORDS:

Extensor carpi radialis brevis; Extensor carpi radialis longus; Radial nerve compression; Variation

PMID:
29713736
DOI:
10.1007/s00276-018-2035-z
[Indexed for MEDLINE]

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