Jang Suk-Hwan, Kim Kyung-Whan, Jang Hyo Seok, Kim Yeong-Seok, Kim Hojin, Kim Youngbok
Department of Orthopedic Surgery, Seoul Paik Hospital, Inje University, Seoul, Korea.
Department of Orthopedic Surgery, Zion Hospital, Busan, Korea.
Clin Shoulder Elb. 2021 Dec;24(4):253-260. doi: 10.5397/cise.2021.00451. Epub 2021 Dec 1.
To suggest a reasonable isometric point based on the anatomical consistency of interosseous membrane (IOM) attachment in association with topographic characteristics of the interosseous crests, the footprints of the central band (CB) of the IOM on the radial and ulnar interosseous crests (RIC and UIC) were measured.
We measured the distance from the CB footprints from each apex of both interosseous crests in 14 cadavers and the angles between the forearm axis of rotation (AOR) and the distal slopes of the RIC and UIC in 33 volunteers.
The CB footprints lay on the downslope of both interosseous crests with its upper margin on average 3-mm proximal from the RIC's apex consistently in the radial length, showing normality (p>0.05), and on average 16-mm distal from the UIC's apex on the ulna without satisfying normality (p<0.05). The average angle between the UIC's distal slope and the AOR was 1.3°, and the RIC's distal slope to the AOR was 14.0°, satisfying the normality tests (p>0.05), and there was no side-to-side difference in both forearms (p<0.05).
The CB attached to the downslope just distal to the RIC's apex constrains the radius to the UIC that coincides with the AOR of the forearm circumduction, maintaining itself both isometrically and isotonically.
基于骨间膜（IOM）附着的解剖学一致性以及骨间嵴的地形特征，为了确定一个合理的等长点，我们测量了IOM中央束（CB）在桡骨和尺骨骨间嵴（RIC和UIC）上的足迹。
我们测量了14具尸体双侧骨间嵴各顶点到CB足迹的距离，以及33名志愿者前臂旋转轴（AOR）与RIC和UIC远端斜坡之间的角度。
CB足迹位于双侧骨间嵴的下坡，其在桡骨侧的上缘平均距离RIC顶点近端3mm，在桡骨长度上呈正态分布（p>0.05），而在尺骨侧平均距离UIC顶点远端16mm，不满足正态分布（p<0.05）。UIC远端斜坡与AOR的平均角度为1.3°，RIC远端斜坡与AOR的平均角度为14.0°，均满足正态性检验（p>0.05），且双侧前臂无差异（p<0.05）。
附着于RIC顶点远端下坡的CB将桡骨限制于与前臂环转AOR一致的UIC，从而保持自身等长和等张状态。
