Pires L, Perissé J-P, Araújo G C S, Manaia J, Fonseca Júnior A, Babinski M A
Universidade Federal Fluminense, Rua Professor Ernani Mello, 101, 24210-150 Niterói, Brazil.
Folia Morphol (Warsz). 2018;77(2):403-405. doi: 10.5603/FM.a2017.0102. Epub 2017 Oct 24.
Variations of the forearm musculature are vastly described in the literature. The palmaris longus muscle is one of the most variable structures of the human body. It usually arises from the medial epicondyle of the humerus and inserts itself into the palmar aponeurosis. Anatomy textbooks and recent papers state that this muscle may act as a weak wrist flexor. The present work aims to report an anatomical variation where the palmaris longus muscle was abnormally hypertrophied and was completely fleshy throughout the whole forearm. Anatomical variations of the palmaris longus may induce symptoms of neurovascular bundle compression, especially of the median nerve. The palmaris longus muscle may be used in tendon graft or muscle graft, due to its lack of apparent function. Furthermore, it is one of the anatomical landmarks for local anaesthesia procedures. (Folia Morphol 2018; 77, 2: 403-405).
文献中对前臂肌肉组织的变异有大量描述。掌长肌是人体中变异最大的结构之一。它通常起自肱骨内上髁，止于掌腱膜。解剖学教科书和近期论文表明，该肌肉可作为较弱的腕屈肌。本研究旨在报告一种解剖变异情况，即掌长肌异常肥大且在前臂全程完全为肉质。掌长肌的解剖变异可能引发神经血管束受压症状，尤其是正中神经。由于掌长肌缺乏明显功能，可用于肌腱移植或肌肉移植。此外，它是局部麻醉操作的解剖标志之一。（《形态学杂志》2018年；77卷，第2期：403 - 405页）
