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semimembranosus |
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semimembranosus [¦sem·i‚mem·brə′nō·səs] (anatomy) One of the hamstring muscles, arising from the ischial tuber, and inserted into the tibia. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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[20] The timing of electromyographic (EMG) activity in individual paretic limb muscles exhibited 2 distinct types of abnormalities that were correlated with this lesser work production: prolonged excitation in the vastus medialis muscle (VM) and phase-advanced excitation (both early initiation and early termination) in the rectus femoris muscle (RF) and the semimembranosus muscle (SM). These territories are arranged in parallel in the BF and semimembranosus muscles and in series in the semitendinosus muscle, and, because they are innervated by what appear to be primary branches of the hamstring nerves, they have been treated as compartments. The semimembranosus muscle could contribute to the compensatory flexion of the knees, whereas soleus muscle activation might function to restrain forward displacement of the shank. |
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