Posterior Thigh Flashcards
What innervates the biceps femoris?
Long head: sciatic nerve (tibial division, L5 - S2)
Short head: sciatic nerve (common fibular division)
What is the main action of the biceps femoris?
Flexes and laterally rotates leg
Long head: extends thigh the hip
What innervates the semimembranosus?
Sciatic nerve (tibial division)
What is the main action of the semimembranosus?
Flexes leg, extends thigh
What innervates the semitendinosus?
Sciatic nerve (tibial division)
What is the main action of the semitendinosus?
Flexes leg, extends thigh
What is the origin of the biceps femoris?
Long Head: Ischial tuberosity and sacrotuberous ligament
Short head: Supracondylar ridge, intermuscular septum, and linea
What is the insertion of the biceps femoris?
Head of the fibula and tibial condyle
What is the origin of the semitendinosus?
Ischial tuberosity with long head of biceps
What is the insertion of the semitendinosus?
Tibial bone and fascia of leg
What is the origin of the semimembranosus?
Ischial tuberosity
What is the insertion of the semimembranosus?
Tibial and Femoral condyles
