Before assessing a novel muscle in the hand, please be very careful

Георгиев, Г.

doi:10.5603/fm.a2023.0028

Folia Morphol

2024

DOI: 10.5603/fm.a2023.0028

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Before assessing a novel muscle in the hand, please be very careful

Г. Георгиев

Abstract: This article is available in open access under Creative Common Attribution-Non-Commercial-No Derivatives 4.0 International (CC BY-NC-ND 4.0) license, allowing to download articles and share them with others as long as they credit the authors and the publisher, but without permission to change them in any way or use them commercially.

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The coracobrachialis muscle: typical morphology, accessory forms, and the issues with terminology

Triantafyllou,

Natsis,

Georgiev

et al. 2023

Surg Radiol Anat

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The coracobrachialis muscle (CB) represents one of the anterior arm compartment muscles. It has been defined by classic anatomy textbooks and old papers, as a muscle of one belly arising from the coracoid process tip and partially from the tendon of the biceps brachii short head, and inserted into the humeral shaft, above the bone’s midpoint. However, recent cadaveric studies have confirmed that in the majority of cases, the CB is a two-headed muscle consisting of a superficial and a deep head. This finding has caused confusion regarding the terminology of CB’s morphology. Typical CB morphology, according to recent data should not be considered the muscle of one belly, but the two-headed muscle. In particular, the musculocutaneous nerve’s (MCN) course plays an important role in defining the CB morphological characteristics. If the MCN courses medially to the CB, with no signs of penetration after dissection, it can be concluded, that the CB is composed of one head; otherwise, if the muscle is composed of two or more heads, the MCN will courses between the CB bellies. In conclusion, it is of paramount importance to adopt common-universal terminology. Hence, considering recent findings, if the CB origin and/or the insertion differs from the typical anatomy, an “atypical CB” is the proper definition of the muscle, while if this “atypical CB” coexists with a typical CB, the terminology “accessory CB” may be used.

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The coracobrachialis muscle: typical morphology, accessory forms, and the issues with terminology

Triantafyllou,

Natsis,

Georgiev

et al. 2023

Surg Radiol Anat

View full text Add to dashboard Cite

show abstract

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Before assessing a novel muscle in the hand, please be very careful

Cited by 1 publication

References 4 publications

The coracobrachialis muscle: typical morphology, accessory forms, and the issues with terminology

The coracobrachialis muscle: typical morphology, accessory forms, and the issues with terminology

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