Macroscopic Observations on Human Lower Leg Muscles
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Using 16 human lower legs from 8 cadavers, we macroscopically examined the origin and insertion, distribution of intramuscular tendons and arrangement of muscle fibers in the lower leg muscles. These muscles were widely covered with the firm fascias that were continuous with the tendons of origin or insertion, and contained one or more intramuscular tendons that were also continuous with the tendons of origin or insertion. Muscle fibers in these muscles arranged unipennately, bipennately or radially among the intramuscular tendons and fascias. According to arrange of the muscle fibers, the proximal two third of the tibialis anterior can be regarded as the radiate type, and the distal one third, as the unipennate type. The proximal half of the extensor digitorum longus can be regarded as the radiate type and the distal half, as the unipennate type. The proximal half of the peroneus longus and brevis belong to the bipennate type and the distal half, to the unipennate type. We found also that in the extensor digitorum longus, medial head of the gastrocnemius and soleus, the tendon of origin or insertion twisted spirally. It should be emphasized that distribution of the intramuscular tendons and arrangement of the muscle fibers are very important for the palpation and stretching of muscles in the physical therapy.
- Bulletin of health sciences Kobe
Bulletin of health sciences Kobe (16), 63-76, 2000-12-27