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Posterior Thigh Muscles
Origins, insertions, innervations, actions, and blood supply for the muscles of the posterior thigh
15
Anatomy
Graduate
09/16/2011

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Term
Semitendinosus: origin
Definition
upper and medial ischial tuberosity
Term
Semitendinosus: insertion
Definition
superior part of medial surface of tibia (pes anserinus)
Term
Semitendinosus: innervation
Definition
tibial division of sciatic n. (L5 to S2)
Term
Semitendinosus: action
Definition
flexes leg, extends thigh
Term
Semitendinosus: blood supply
Definition
perforating branch of deep a. of thigh, superior muscular branches of popliteal a.
Term
Semimembranosus: origin
Definition
upper and lateral ischial tuberosity
Term
Semimembranosus: insertion
Definition
posterior part of medial condyle of tibia
Term
Semimembranosus: innervation
Definition
tibial division of sciatic n. (L5 to S2)
Term
Semimembranosus: action
Definition
flexes leg, extends thigh
Term
Semimembranosus: blood supply
Definition
perforating branch of deep a. of thigh, superior muscular branches of popliteal a.
Term
Biceps femoris: origin
Definition
long head: ischial tuberosity
short head: lateral lip of linea aspera, lateral supracondylar line of femur
Term
Biceps femoris: insertion
Definition
head of fibula, lateral condyle of tibia
Term
Biceps femoris: innervation
Definition
long head: tibial division of sciatic n. (L5 to S2)
short head: common fibular division of sciatic n. (L5 to S2)
Term
Biceps femoris: action
Definition
flexes and laterally rotates leg, extends the thigh
Term
Biceps femoris: blood supply
Definition
perforating branch of deep a. of thigh, superior muscular branches of popliteal a.
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