Figure 3A.

The posteromedial structures of the knee are demonstrated. Note the relationship between the posterior oblique ligament, the meniscus, and the insertions of the semimembranosus tendon. The five insertions of the semimembranosus include the: (1) pars reflexa; (2) direct posteromedial tibial insertion; (3) oblique popliteal ligament insertion; (4) expansion to posterior oblique ligament; and (5) popliteus aponeurosis expansion. (From Sims, WF and Jacobson, KE. The posteromedial corner of the knee: medial-sided injury patterns revisited. Am J Sports Med 2004. 32(2):337-45, permission granted.)

Figure 3B.

Insertions of the semimembranosus (A), with the numbers (1, 4, 3) corresponding to the Figure 3a legend, are shown in a cadaver. The medial gastrocnemius muscle is cut and elevated proximally (B).