使用常规超声和弹性成像技术对桡侧腕屈肌短头进行形态学和功能评估。
Morphological and functional assessment of the flexor carpi radialis brevis using conventional ultrasound and elastography.
机构信息
Department of Hand Surgery, Lausanne University Hospital, 1011, Lausanne, Switzerland.
Department of Diagnostic and Interventional Radiology, Lausanne University Hospital, University of Lausanne, 1011, Lausanne, Switzerland.
出版信息
Surg Radiol Anat. 2021 May;43(5):721-726. doi: 10.1007/s00276-020-02660-y. Epub 2021 Jan 4.
PURPOSE
The flexor carpi radialis brevis (FCRB) is a supernumerary musculotendinous structure of the wrist that has been the focus of some interest in the last decade. While its anatomy is well known, its in vivo function remains unknown as it has never been studied.
METHODS
Eleven cases of FCRB underwent a multimodal ultrasound consisting of B-mode, color Doppler and shear wave elastography.
RESULTS
A pennate shape was observed in all cases and the mean value of the cross-sectional area was 0.8 cm (SD 0.3 cm). Young's modulus was significantly (p < 0.01) different between the resting position and active flexion or passive extension.
CONCLUSION
Our study demonstrates that the FCRB shows biomechanics of a typical skeletal muscle and is voluntarily controlled by flexing the wrist. Absent in other vertebrate taxa, the FCRB probably plays a role in active stability of the wrist in Human.
目的
屈肌支持带短头（FCRB）是腕部的一种多余的肌肉腱结构，在过去十年中引起了一些关注。尽管其解剖结构众所周知，但由于从未进行过研究，其体内功能仍不清楚。
方法
对 11 例 FCRB 进行了多模态超声检查，包括 B 模式、彩色多普勒和剪切波弹性成像。
结果
所有病例均观察到羽状形态，横截面积平均值为 0.8cm（标准差 0.3cm）。在休息位、主动屈曲或被动伸展时，杨氏模量有显著差异（p<0.01）。
结论
我们的研究表明，FCRB 表现出典型骨骼肌的生物力学特性，并通过弯曲手腕进行主动控制。在其他脊椎动物类群中不存在的 FCRB 可能在人类手腕的主动稳定性中发挥作用。
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