Posterior Thigh and Popliteal Fossa Flashcards
Name the 3 hamstring muscles
- Semitendinosus
- Semimembranosus
- Biceps femoris long head
What are the actions of the hamstring muscles
- Extend hip
2. Flex knee
What nerve innervates the majority of the hamstring muscles
Sciatic nerve
Where does the semitendinosus muscle extend from and to
Ischial tuberosity to the medial surface of the superior tibia
Where does the semimembranous muscle extend from and to
Ischial tuberosity to the posterior surface of the medial condyle of the tibia
Where does the long head of the biceps femoris extend from and to
Ischial tuberosity to the head of the fibula
Where does the short head of the biceps femoris extend from and to
Linea aspera and the lateral supracondylar line of the femur to the head of the fibula
What nerve innervates the semitendinosus, semimembranosus and the biceps femoris (long head) muscles
Tibial division of the sciatic nerve (L5, S1, S2)
What nerve innervates the biceps femoris (short head) muscle
Common peroneal division of the sciatic nerve (L5, S1, S2)
When the knee is flexed, what muscle is responsible for lateral rotation of the knee
The biceps femoris
When the knee is flexed, what muscles are responsible for the medial rotation of the knee
- Semimembranosus
- Semitendinosus
- Gracilis
- Sartorius
What forms the superior region of the popliteal fossa
The diverging tendons of the hamstrings
What muscle(s) form(s) the superior lateral border of the popliteal fossa
Biceps femoris
What muscle(s) form(s) the superior medial border of the popliteal fossa
- Semimembranosus
2. Semitendinosus
What forms the inferior border of the popliteal fossa
The medial and lateral heads of gastrocnemius
