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Laboratory 14. Posterior Thigh and Popliteal Fossa
Step 2. Hamstring Muscles

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Identify the following muscles (Figure 14.1) that comprise the hamstring group of muscles [identified at their common origin]:
All of these muscles arise from a common origin on the ischial tuberosity.

Note: All of these muscles are innervated by the sciatic nerve, which has two divisions - the tibial division and the common peroneal
(or fibular) division. It is specifically the tibial division of the sciatic nerve which supplies the hamstring group of muscles.

Links and References:
Grant's: 5.33
Netter (1ed.): 472 (2ed.): 468
Rohen/Yokochi: 430 and 455