Lecture 6 - Posterior Thigh & Popliteal Fossa Flashcards
Features of proximal tibia (3)
- medial condyle
- lateral condyle
- tibial tuberosity
(the tibia is medial and has a much larger proximal head than the fibula)
Feature of the proximal fibula (1)
head
Posterior thigh muscles (IV)
- biceps femoris (long head) and biceps femoris (short head)
- semitendinoseus
- semimebranosus
Biceps femoris - long head: origin
ishcial tubersority
Biceps femoris - long head: insertions (2)
- lateral condyle of tibia
- head of fibula
Biceps femoris - long head: actions (3)
- knee flexion
- lateral rotation of tibia
- hip extension
Biceps femoris - long head: innervations (2)
sciatic nerve -> tibial nerve
Biceps femoris - short head: origin
linea aspera
Biceps femoris - short head: insertions (2)
- lateral condyle of tibia
- head of fibula
Biceps femoris - short head: actions (2)
- knee flexion
- medial rotation of tibia
Biceps femoris - short head: innervations (2)
sciatic nerve -> common fibular nerve
Semitendinosus: origin
ischial tuberosity
Semitendinosus: insertion
proximal medial tibia
Semitendinosus: actions (3)
- knee flexion
- medial rotation of tibia
- hip extension
Semitendinosus: innervations (2)
sciatic nerve -> tibial nerve
Semimembranosus: origin
ischial tuberosity
Semimembranosus: insertion
medial condyle of tibia
Semimembranosus: actions (3)
- knee flexion
- medial rotation of tibia
- hip extension
Semimembranosus: innervations (2)
sciatic nerve -> tibial nerve
What is the Pes Anserinus?
- “Goose’s foot” cause it looks like a goose’s foot
- combined tendons of 3 muscles inserting onto the proximal medial tibia
What three muscles are part of the Pes Anserinus?
- sartorius
- gracilis
- semitendinosus
What is the popliteal fossa?
the space located directly posterior to the knee joint
What are the 5 borders of the popliteal fossa?
- superomedial
- superolateral
- inferomedial
- inferolateral
- floor
What muscle makes the superomedial border of the popliteal fossa?
semimembranosus
What muscle makes the superolateral border of the popliteal fossa?
biceps femoris (long head)
What muscle makes the inferomedial border of the popliteal fossa?
gastrocnemius (medial head)
What muscle makes the inferolateral border of the popliteal fossa? (3)
- gastrocnemius (lateral head)
- plantaris
- popliteus
What structures makes the floor border of the popliteal fossa? (2)
posterior surfaces of femur & tibia
What is in the popliteal fossa? (6)
- popliteal vein
- poplitea artery
- sciatic nerve
- tibial nerve
- common fibular nerve
- deep popliteal lymph nodes
Blood supply of the thigh and knee (first 4)
external iliac artery -> femoral artery -> deep femoral artery or popliteal artery
Where does the blood go after the deep femoral artery? (2)
medial circumflex femoral artery or lateral circumflex femoral artery
Where does the blood go after the politeal artery? (4)
- medial superior genicular artery
- lateral superior genicular artery
- medial inferior genicular artery
- later inferior genicular artery
Venous drainage of the thigh and knee
(first 5)
external iliac vein <- femoral vein <- deep femoral vein or great saphenous vein or popliteal vein
where does the blood come from before going into the deep femoral vein? (2)
medial circumflex femoral vein or lateral circumflex femoral vein
where does the blood come from before going into the popliteal vein? (4)
- medial superior genicular vein
- lateral superior genicular vein
- medial inferior genicular vein
- later inferior genicular vein
