Thenar and hypothenar muscle origins on the transverse carpal ligament.

IF 1.9 3区医学 Q2 ANATOMY & MORPHOLOGY

Journal of Anatomy Pub Date : 2025-09-30 DOI:10.1111/joa.70054

David B Jordan, Hui Zhang, Mary N Henderson, C Kent Kwoh, Zong-Ming Li

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Abstract

The thenar and hypothenar muscles of the hand have origins on the transverse carpal ligament (TCL). Understanding the morphological distribution of this muscle-ligament interaction has clinical and biomechanical benefits. Robot-assisted ultrasonography was used to reconstruct the three-dimensional TCL volar surface and TCL-muscle interface in ten cadaveric specimens. The interface areas and radial-ulnar length at discretized proximal-distal tunnel levels were calculated. The total area of the TCL volar surface was 457.4 ± 62.2 mm². The TCL-thenar and TCL-hypothenar interface areas were 142.3 ± 38.0 mm² (30.8 ± 6.6%) and 32.3 ± 22.4 mm² (7.0 ± 4.7%), respectively. The TCL area not interfaced by the thenar or hypothenar muscles was 282.72 ± 40.8 mm² (62.1 ± 7.4%). The relative radial-ulnar TCL-muscle interface length was significantly dependent upon muscle group (p < 0.001) and proximal-distal carpal tunnel level (p < 0.001). The maximum percentage of the radial-ulnar length of the TCL volar surface occupied by the TCL-thenar and TCL-hypothenar interface was 57.0 ± 9.9% and 15.5 ± 9.6%, respectively. Quantification of the three-dimensional muscle coverage distribution on the TCL can help to advance anatomical understanding, inform biomechanical mechanisms for utilizing the muscle-ligament interaction, and minimize potential functional disruption of carpal tunnel release.

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大鱼际和鱼际下肌肉起源于腕横韧带。

手的鱼际和鱼际下肌起源于腕横韧带（TCL）。了解这种肌肉-韧带相互作用的形态分布具有临床和生物力学上的好处。采用机器人辅助超声技术对10例尸体标本的TCL掌面及TCL-肌肉界面进行三维重建。计算离散近端和远端隧道水平的界面面积和桡尺长度。TCL掌面总面积457.4±62.2 mm2。tcl -鱼际和tcl -鱼际下界面面积分别为142.3±38.0 mm2（30.8±6.6%）和32.3±22.4 mm2（7.0±4.7%）。未与鱼际或鱼际下肌接触的TCL面积为282.72±40.8 mm2（62.1±7.4%）。桡骨-尺骨tcl -肌肉界面的相对长度显著依赖于肌肉群(p

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来源期刊

Journal of Anatomy 医学-解剖学与形态学

CiteScore

4.80

自引率

8.30%

发文量

183

审稿时长

4-8 weeks

期刊介绍： Journal of Anatomy is an international peer-reviewed journal sponsored by the Anatomical Society. The journal publishes original papers, invited review articles and book reviews. Its main focus is to understand anatomy through an analysis of structure, function, development and evolution. Priority will be given to studies of that clearly articulate their relevance to the anatomical community. Focal areas include: experimental studies, contributions based on molecular and cell biology and on the application of modern imaging techniques and papers with novel methods or synthetic perspective on an anatomical system. Studies that are essentially descriptive anatomy are appropriate only if they communicate clearly a broader functional or evolutionary significance. You must clearly state the broader implications of your work in the abstract. We particularly welcome submissions in the following areas: Cell biology and tissue architecture Comparative functional morphology Developmental biology Evolutionary developmental biology Evolutionary morphology Functional human anatomy Integrative vertebrate paleontology Methodological innovations in anatomical research Musculoskeletal system Neuroanatomy and neurodegeneration Significant advances in anatomical education.