Posterior thigh and popliteal fossa Flashcards
Posterior thigh
Has the hamstrings which extend the hip and flex the knee
Hamstrings are composed of three muscles
semitendinous
semimembranosus
Biceps Femoris
Semitendinous
Ischial tuberosity > medial surface of superior tibia
Tibial division of sciatic nerve
- L5, S1 ,S2
Semimembranosus
Ischial tuberosity > posterior surface of medial condyle of tibia
Tibial division of sciatic
L5, S1 , S2
Biceps femoris
Long head : Ischial tuberosity
Short head: Linea aspera and lateral supracondylar line of femur
> head of fibula
Long head = tibial divison of sciatic (L5, S1, S2,0
Short head = common peroneal division of Sciatic ( l5, S1, S2)
Which muscle laterally rotates the knee when it is flexed?
Biceps femoris
Which muscles medially rotates the knee when it is flexed?
semimembranosus
semitendinosus
Gracilis
Sartorius
Sciatic nerve
Anterior rami L4-S3
Deep to head of biceps femoris
Tibial and common peroneal (fibular) division
Roof of popliteal fossa is made of
deep fascia
Roof of popliteal fossa is pierced by
sural nerve
short saphenous vein
Boundaries of popliteal fossa
Superiorly : Diverging tendons of hamstrings
- biceps femoris laterally
- semimembranosus and semitendinosus
Inferiorly: Medial and lateral heads of gastrocnemius
Name the popliteal contents starting medial and deep and going towards lateral and superficial
popliteal artery Popliteal vein Terminal branch of Sciatic -Tibial nerve -Common peroneal nerve
The floor of the popliteal fossa
Popliteal surface of femur Capsule of knee jt Popliteus muscle Oblique popliteal ligament Middle Genicular vessels
Oblique popliteal ligament
Expansion of semimembranous
reinforces knee joint capsule
Middle genicular vessel
Pierces joint capsule to supply cruciate ligaments
