Polish Mother's Memorial Hospital Research Institute, Department of Diagnostic Imaging Lodz, Poland.
Department of Normal and Clinical Anatomy, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Poland.
Ann Anat. 2019 May;223:85-89. doi: 10.1016/j.aanat.2019.01.014. Epub 2019 Feb 21.
Our aim was to characterize the morphology of the proximal attachment of the biceps brachii short head. We hypothesize that it has an aponeurotic component that may affect shoulder joint biomechanics.
The coracoacromial region and the biceps brachii muscle were dissected in 30 cadaveric shoulders. The course and dimensions of the tendon and aponeurosis were evaluated. The cross-sectional area of the belly of the short head and the length of the whole muscle were measured. Correlations between the aponeurosis and dimensions of the muscle were tested with the Spearman's rank correlation coefficient.
Aponeurosis was present in all specimens, although in 10 cases it was vestigial. The aponeurotic part of the muscle (mean length 90.7 ± 16.3 mm, mean width 12.5 ± 2.9 mm) branched off laterally and traveled to the acromion, blending with the coracoacromial ligament creating the aponeurotic membrane. We named this structure the "superior biceps aponeurosis". The mean length of the biceps brachii was 31.3 ± 2.1 cm and the mean cross-sectional area of the short head was 210.7 ± 54.3 mm. The dimensions of the "superior biceps aponeurosis" correlated positively with the cross-sectional area of the muscle (R from 0.37 to 0.52, p from 0.014 to 0.001).
The origin of the short head of the biceps brachii muscle has a varied aponeurotic component combining the aponeurotic part of the muscle and the aponeurotic membrane. Together, they create the "superior biceps aponeurosis".
The morphology of the origin of the biceps brachii short head is relevant in Bristow/Latarjet procedures. This aponeurotic component may affect the shoulder joint biomechanics after the coracoid process transfer.
本研究旨在对肱二头肌短头近端附着处的形态结构进行分析。我们假设其具有腱膜结构，这可能会影响肩关节的生物力学。
在 30 例尸体肩关节中解剖出肩峰下区域和肱二头肌。评估肌腱和腱膜的走行和尺寸。测量肱二头肌短头肌腹的横截面积和整块肌肉的长度。使用 Spearman 秩相关系数检验腱膜与肌肉尺寸之间的相关性。
所有标本均存在腱膜，尽管在 10 例中腱膜较小。肌的腱膜部分（平均长度 90.7±16.3mm，平均宽度 12.5±2.9mm）从侧面分支，并延伸至肩峰，与肩峰喙突韧带融合形成腱膜，我们将其命名为“肱二头肌上腱膜”。肱二头肌的平均长度为 31.3±2.1cm，肱二头肌短头的平均横截面积为 210.7±54.3mm。“肱二头肌上腱膜”的尺寸与肌肉横截面积呈正相关（相关系数 R 为 0.37 至 0.52，p 值为 0.014 至 0.001）。
肱二头肌短头的起点具有多样化的腱膜结构，包括肌的腱膜部分和腱膜。两者共同形成“肱二头肌上腱膜”。
肱二头肌短头起点的形态结构与 Bristow/Latarjet 手术相关。该腱膜结构可能会影响喙突转移后肩关节的生物力学。
