<Tr> <Th> TA </Th> <Td> A04. 7.02. 036 </Td> </Tr> <Tr> <Th> FMA </Th> <Td> 22438 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terms of muscle (edit on Wikidata) </Td> </Tr> <P> The semimembranosus (/ ˌsɛmimɛmbrəˈnoʊsəs /) is the medial-most of the three hamstring muscles . It is so named because it has a flat tendon of origin . It lies posteromedially in the thigh, deep to the semitendinosus . </P>

Which movement will lengthen the fibers of the semimembranosus