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Gross Anatomy 2
Posterior thigh and popliteal fossa
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Posterior Thigh
•Hamstrings
–Semitendinosus
–Semimembranosus
–Biceps Femoris
•Extend
hip,
Flex
knee
Semitendinosus
Ischial tuberosity
Medial surface of
superior tibia
•Tibial division of
Sciatic
–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
division of
Sciatic
(L5,S1,S2)
•Short head =
Common peroneal
division of
Sciatic
(L5,S1,S2)
Biceps
Femoris
Rotation of Knee
•When Knee is Flexed:
–Lateral rotation by:
•Biceps
Femoris
–Medial rotation by:
•Semimembranosus
•Semitendinosus
•Gracilis
•Sartorius
Sciatic Nerve
•Anterior rami
L4-S3
•Deep to long head of biceps
femoris
•Tibial
and
Common
Peroneal (fibular) Divisions
Popliteal Fossa –
Roof
•Deep fascia
•Pierced by:
–Sural
nerve
–Short
saphenous
vein
Popliteal Fossa – Boundaries
•Superiorly: Diverging tendons of
Hamstrings
–Biceps femoris
laterally
–Semimembranosus and Semitendinosus
medially
•Inferiorly: Medial and Lateral heads of
Gastrocnemius
Popliteal Fossa – Contents
•Popliteal
artery
•Popliteal
vein
•Terminal
branches of Sciatic
–Tibial
nerve
–Common
peroneal nerve
Popliteal Fossa –
Contents
Popliteal Fossa – Floor
•Popliteal
surface of femur
•Capsule
of Knee Jt.
•Popliteus
muscle
Popliteal Fossa –
Floor
•Oblique
popliteal ligament
–Expansion of
Semimembranosus
–Reinforces knee joint capsule
•Arcuate
ligament
–Thickening of knee joint capsule where it is pierced by popliteus
•Middle Genicular
vessels
–Pierce joint
capsule
to supply cruciate ligaments
Popliteal Artery
•Continuation of
femoral
artery
•Adductor
hiatus
→Inferior border of
Popliteus
•5
genicular branches
•Terminal branches:
–Anterior Tibial
artery
–Posterior Tibial
artery
Popliteal
Artery
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