Posterior thigh and popliteal fossa Flashcards
what does the femur articulate with proximally?
The acetabulum
What does the femur articulate with distally?
The Tibia
What is the name for the pair of ridges that run longitudinally along the dorsal surface of the femur?
The linea aspera
Name the deep fascia that surrounds the muscles of the thigh?
Fascia lata
What is the function of the three inter muscular septa that attach to the linea aspera?
to divide the muscles of the thigh into three compartments
what is the main function of the anterior compartment?
To extend the leg at knee joint
What is the main function of the medial compartment?
To adduct the thigh at hip joint
What is the main function of the posterior compartment?
To extend the thigh at hip joint and flex the leg at knee joint.
What is the name given to the muscles in the posterior compartment of the thigh?
The Hamstring muscles
Name the three hamstring muscles?
Biceps femoris (long head)
Semitendinosus
Semimembranosus
where is the common origin of the hamstring muscles?
Ischial tuberosity
What is the innervation of the hamstring muscles?
Sciatic nerve L5, S1, S2
Main function of the hamstring muscles?
Extend the thigh at hip joint and flex the leg at knee joint
Is the short head of biceps considered part of the hamstrings?
No
Which hamstring laterally rotates the thigh?
Biceps femoris
Which hamstrings medially rotates the thigh?
Semimembranonus and semitendinosus
what is the origin of the hamstring part of adductor magnus?
the ischial tuberosity
What is the origin of the adductor part of adductor magnus?
ischiopubic ramus
What does the Sciatic nerve divide into?
the common fibular and tibial nerves
Where does the common fibular run?
It deviates laterally
Where does the tibial nerve run?
continues down he midline
Which nerves enter the popliteal fossa?
The common fibular and the tibial
Name the diamond depression located on the posterior of the knee?
The popliteal fossa
Which muscles form the upper margins of the popliteal fossa?
Medially = semitendinosus and semimembranosus Laterally = Biceps femoris
What forms the lower margins of the popliteal fossa?
Medially = the medial head of gastrocnemius laterally = the lateral head of gastrocnemius and plantaris
What is the roof of the popliteal fossa formed by?
The deep fascia - continuous above with the fascia late of the thigh
What are the contents of the popliteal fossa?
Popliteal artery and vein
Common fibular nerve
Tibial nerve
