Graduate School of Health Science, Sapporo Medical University, Sapporo, Japan.
Second Division of Physical Therapy, School of Health Sciences, Sapporo Medical University, Sapporo, Japan.
Foot Ankle Surg. 2020 Aug;26(6):607-613. doi: 10.1016/j.fas.2019.08.003. Epub 2019 Aug 12.
The flexor hallucis longus (FHL) muscle often has a tendinous slip with a variable number of branches. We aimed at developing the FHL branch test to determine the number of FHL branches.
In anatomical validation study, 6 intact cadavers were used. The toe flexion angles were measured while the FHL and flexor digitorum longus (FDL) were manually pulled individually. For electrophysiological studies, 4 healthy men participated. The FHL was electrically stimulated, and electromyography (EMG) of the FHL and FDL were recorded during the FHL branch test.
The toe flexion angles' changes in the FHL pulling condition were equivalent with pulling FDL in toes with FHL branching. The electrical stimulation of the FHL produced similar flexion as the FHL branch test. EMG of the FHL was higher than FDL during the FHL branch test (p=0.036).
The FHL branch test could be used to evaluate the number of FHL branches.
屈趾长肌（FHL）常常有一个带有可变数量分支的肌腱滑液。我们旨在开发 FHL 分支测试来确定 FHL 分支的数量。
在解剖验证研究中，使用了 6 个完整的尸体。当单独手动牵拉 FHL 和趾长屈肌（FDL）时，测量了脚趾的弯曲角度。对于电生理研究，有 4 名健康男性参与。在 FHL 分支测试期间，对 FHL 进行电刺激，并记录 FHL 和 FDL 的肌电图（EMG）。
在 FHL 分支的情况下，脚趾的弯曲角度变化与牵拉 FDL 时的脚趾弯曲角度变化相当。FHL 的电刺激产生的弯曲与 FHL 分支测试相似。在 FHL 分支测试期间，FHL 的 EMG 高于 FDL（p=0.036）。
FHL 分支测试可用于评估 FHL 分支的数量。
