Salva-Coll G, Garcia-Elias M, Leon-Lopez M T, Llusa-Perez M, Rodríguez-Baeza A
Department of Hand and Microsurgery, Ibacma Institut and Son Llàtzer Hospital, Palma de Mallorca, Spain.
J Hand Surg Eur Vol. 2011 Sep;36(7):553-9. doi: 10.1177/1753193411407671. Epub 2011 May 18.
Thirty cadaveric forearms were tested using a wrist testing apparatus specifically designed to investigate the mechanisms of muscle stabilization of the wrist. The specimens were set in a jig allowing the distal row to migrate proximally and to rotate around the pronosupination forearm axis. Five wrist motor tendons (FCR, FCU, ECU, ECRL and APL) were loaded with specific weights. Reactive rotations of the scaphoid, triquetrum and capitate were measured by an electromagnetic motion tracking device. When all five tendons were loaded simultaneously, the capitate supinated and the proximal row predominantly supinated and flexed. By contrast, when the ECU was loaded in isolation, it caused pronation to both proximal and distal rows. The FCR exhibited a mixed effect pronating the capitate and triquetrum, whilst supinating the scaphoid. Based on this, a hypothesis is proposed linking wrist stability to the balance of wrist pronators (ECU and FCR) and supinators (FCU, ECRL and APL).
使用专门设计用于研究腕部肌肉稳定机制的腕部测试装置对30个尸体前臂进行了测试。标本被放置在一个夹具中，使远侧列能够向近端移动并绕前臂旋前旋后轴旋转。五个腕部运动肌腱（桡侧腕屈肌、尺侧腕屈肌、尺侧腕伸肌、桡侧腕长伸肌和拇长展肌）被加载特定重量。通过电磁运动跟踪装置测量舟骨、三角骨和头状骨的反应性旋转。当同时加载所有五条肌腱时，头状骨旋后，近侧列主要旋后并屈曲。相比之下，当单独加载尺侧腕伸肌时，它会导致近侧列和远侧列旋前。桡侧腕屈肌表现出混合效应，使头状骨和三角骨旋前，同时使舟骨旋后。基于此，提出了一个将腕部稳定性与腕部旋前肌（尺侧腕伸肌和桡侧腕屈肌）和旋后肌（尺侧腕屈肌、桡侧腕长伸肌和拇长展肌）的平衡联系起来的假设。
