The accessory brachioradialis muscle: prevalence of a rare variant with possible clinical implications.

IF 1.4 4区医学 Q2 Medicine Surgical and Radiologic Anatomy Pub Date : 2024-08-13 DOI:10.1007/s00276-024-03462-2

George Triantafyllou, Krzysztof Koptas, Nicol Zielinska, Maria Piagkou, Łukasz Olewnik

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Abstract

Purpose: The brachioradialis muscle (BRM) belongs to the lateral group of forearm muscles and contributes to the elbow flexion. Accessory brachioradialis muscle (ABRM) or "brachioradialis accessorius" represents an uncommon BRM variant, not been enough studied. The present study investigates the prevalence of the ABRM, along with its origin, insertion, and innervation.

Materials: Eighty-three upper limbs were meticulously dissected at the arm, forearm, and cubital fossa to investigate the ABRM presence. When the variant muscle was identified, morphometric measurements were obtained.

Results: The ABRM was identified in two upper limbs (2/83, 2.4%), in a male cadaver, bilaterally. Its origin was located along with the typical BRM, and its insertion was identified into the anterior surface of the radius (proximal third). The ABRM was innervated by the radial nerve, coursing posteriorly (deeply).

Conclusions: In the current study, the variant muscle was observed in 2.4%. Radial nerve compression, at the forearm, is not an uncommon entrapment neuropathy. The relationship between the radial nerve and the ABRM could precipitate radial neuropathy.

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肱二头肌附属肌：一种罕见变异的流行与可能的临床影响。

目的：肱二头肌（BRM）属于前臂外侧肌肉群，对肘关节的屈伸有一定作用。肱二头肌附属肌（ABRM）或 "肱二头肌附属肌 "是一种不常见的肱二头肌变异肌，目前对其研究尚不充分。本研究调查了肱二头肌的发病率及其起源、插入和神经支配：材料：对 83 个上肢的手臂、前臂和肘窝进行了细致解剖，以调查 ABRM 的存在情况。在确定变异肌肉后，对其进行形态测量：结果：在一具男性尸体的双侧上肢中发现了 ABRM（2/83，2.4%）。ABRM 的起源与典型的 BRM 位于同一位置，其插入部位位于桡骨前表面（近三分之一处）。ABRM 由桡神经支配，向后方（深部）走行：在本次研究中，2.4%的患者发现了变异肌肉。前臂桡神经受压并不是一种罕见的卡压性神经病。桡神经和 ABRM 之间的关系可能导致桡神经病变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surgical and Radiologic Anatomy Medicine-Pathology and Forensic Medicine

CiteScore

2.40

自引率

14.30%

发文量

期刊介绍： Anatomy is a morphological science which cannot fail to interest the clinician. The practical application of anatomical research to clinical problems necessitates special adaptation and selectivity in choosing from numerous international works. Although there is a tendency to believe that meaningful advances in anatomy are unlikely, constant revision is necessary. Surgical and Radiologic Anatomy, the first international journal of Clinical anatomy has been created in this spirit. Its goal is to serve clinicians, regardless of speciality-physicians, surgeons, radiologists or other specialists-as an indispensable aid with which they can improve their knowledge of anatomy. Each issue includes: Original papers, review articles, articles on the anatomical bases of medical, surgical and radiological techniques, articles of normal radiologic anatomy, brief reviews of anatomical publications of clinical interest. Particular attention is given to high quality illustrations, which are indispensable for a better understanding of anatomical problems. Surgical and Radiologic Anatomy is a journal written by anatomists for clinicians with a special interest in anatomy.