Mercy Medical Center, Institute for Foot and Ankle Reconstruction, Baltimore, MD 21202, USA.
Foot Ankle Int. 2012 May;33(5):394-9. doi: 10.3113/FAI.2012.0394.
In 1985, Silver et al. published a cadaver study which determined the relative order of strength of the muscles in the calf. Muscle strength, which is proportional to volume, was obtained by dissecting out the individual muscles, weighing them, and then multiplying by the specific gravity. No similar studies have been performed using {\it in vivo} measurements of muscle volume.
Ten normal subjects underwent 3-Tesla MRI's of both lower extremities using non-fat-saturated T2 SPACE sequences. The volume for each muscle was determined by tracing the muscle contour on sequential axial images and then interpolating the volume using imaging software.
The results from this study differ from Silver's original article. The lateral head of the gastrocnemius was found to be stronger than the tibialis anterior muscle. The FHL and EDL muscles were both stronger than the peroneus longus. There was no significant difference in strength between the peroneus longus and brevis muscles.
This revised order of muscle strengths in the calf based on in vivo MRI findings may assist surgeons in determining the optimal tendons to transfer in order to address muscle weakness and deformity.
1985 年，Silver 等人发表了一项关于小腿肌肉力量的研究，该研究确定了小腿肌肉的相对强度顺序。肌肉力量与体积成正比，通过解剖出各个肌肉、称重，然后乘以比重来获得。目前还没有使用肌肉体积的{\it 活体}测量进行类似的研究。
10 名正常受试者接受了双侧下肢 3-Tesla MRI 检查，使用非脂肪饱和 T2 SPACE 序列。通过在连续轴位图像上追踪肌肉轮廓，然后使用成像软件内插体积来确定每个肌肉的体积。
本研究的结果与 Silver 的原始文章不同。发现比目鱼肌的外侧头比胫骨前肌更强壮。腓骨长短肌和趾长伸肌均比腓骨长肌强壮。腓骨长肌和腓骨短肌之间的力量没有显著差异。
基于活体 MRI 发现，对小腿肌肉力量的这种重新排序可能有助于外科医生确定最佳的肌腱转移以解决肌肉无力和畸形。
