Frequency and characterization of the accessory heads of the biceps brachii: A multicentric cadaveric study

Q3 Medicine Morphologie Pub Date : 2024-03-30 DOI:10.1016/j.morpho.2024.100776

W.G. Lira-Bandeira , M.B. Montello , E.C. Moretti , I.B. Da Silva , G.A. Lemos , J.B. Oliveira , J.B. Da Silva , E.G. De Oliveira

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Abstract

Purpose

The biceps brachii muscle (BBM) is a large and thick muscle on the ventral portion of the upper arm. The scientific literature reports the existence of extra heads.

Objective

The present work investigated the frequency of occurrence of BBM accessory head(s) in four different Anatomy Laboratories at universities in Northeast Brazil.

Material and methods

Once the upper limbs with an anatomical variation of the BBM heads were identified, the accessory head was evaluated for morphometric characterization (the length, width, and thickness).

Results

The sample consisted of 249 upper limbs and the outcomes were 26 members with BBM accessory heads (10.44% of the total sample). Among the 26 members studied was found a single accessory head in 22 (84.62%), two accessory heads in 3 (11.54%), and three accessory heads in 1 (3.85%). BBMs with one, two, and three accessory heads were found, with different origins. The average length, width, and thickness of these accessory heads were 169.39 mm, 10.25 mm, and 3.39 mm, respectively.

Conclusion

The frequency of BBM accessory heads in a population of northeastern Brazil in this cadaveric study was 10.44%.

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肱二头肌附属头的频率和特征：一项多中心尸体研究

目的肱二头肌（BBM）是上臂腹侧的一块大而厚的肌肉。本研究调查了巴西东北部四所大学解剖实验室中肱二头肌辅助头的出现频率。材料和方法一旦确定了肱二头肌辅助头解剖变异的上肢，就对辅助头的形态特征（长度、宽度和厚度）进行评估。结果样本包括 249 个上肢，结果发现 26 个成员有肱二头肌辅助头（占样本总数的 10.44%）。在研究的 26 名成员中，22 人（84.62%）有一个附属头，3 人（11.54%）有两个附属头，1 人（3.85%）有三个附属头。发现有一个、两个和三个附属头的 BBM，其来源各不相同。这些附属头的平均长度、宽度和厚度分别为 169.39 毫米、10.25 毫米和 3.39 毫米。

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

Morphologie Medicine-Anatomy

CiteScore

2.30

自引率

0.00%

发文量

150

审稿时长

25 days

期刊介绍： Morphologie est une revue universitaire avec une ouverture médicale qui sa adresse aux enseignants, aux étudiants, aux chercheurs et aux cliniciens en anatomie et en morphologie. Vous y trouverez les développements les plus actuels de votre spécialité, en France comme a international. Le objectif de Morphologie est d?offrir des lectures privilégiées sous forme de revues générales, d?articles originaux, de mises au point didactiques et de revues de la littérature, qui permettront notamment aux enseignants de optimiser leurs cours et aux spécialistes d?enrichir leurs connaissances.