the posterior thigh & popliteal fossa

Question 1

hamstrings

Answer 1

• groups of 3 muscles
• most cross 2 joints (hip, knee)
• crucial for gait —> hip extension and knee flexion

Question 2

biceps femoris- long head

Answer 2

O: ischial tuberosity
I: lateral condyle of tibia, head of fibula
A: knee flexion, medial rotation of tibia, hip extension
I: sciatic n–> tibial n.

Question 3

biceps femoris- short head

Answer 3

O: linea aspera
I: lateral condyle of tibia, head of fibula
A: knee flexion, lateral rotation of tibia
In: sciatic n–> common fibular n

Question 4

semitendinosus

Answer 4

O: ischial tuberosity
I: proximal medial tibia
A: knee flexion, medial rotation of tibia, hip extension
In: sciatic n–> tibial n
- LONG tendon
- superficial and medial

Question 5

semimembranosus

Answer 5

O: ischial tuberosity
I: medial condyle of tibia
A: knee flexion, medial rotation of tibia, hip extension
In: sciatic n–> tibial n
- wide and flat muscles
- belly deep

Question 6

goose foot

Answer 6

• combined tendons of 3 muscles interesting onto the proximal medial tibia
  1. sartorius (anterior)
  2. gracilis (medial)
  3. semitendinosus (posterior)

Question 7

popliteal fossa

Answer 7

the space located directly posterior to the knee joint

Question 8

popliteal fossa: borders

Answer 8

superomedial: semimembranosus
superolateral: biceps femoris (long head)
inferomedial: gastrocnemius (medial head)
inferolateral: gastrocnemius (lateral head), plantaris, popliteus
floor: posterior surface of femur and tibia

Question 9

popliteal fossa: contents

Answer 9

• popliteal vein
• popliteal artery
• tibial nerve
• common fibular nerve
• fascia lata
• deep popliteal lymph nodes
  (sciatic nerve- doesn’t usually go through)

Question 10

which muscle is NOT a border of the popliteal fossa
a) semimembranosus
b) semitendinosus
c) gastrocnemius
d) popliteus
e) biceps femoris (long head)

Answer 10

b)

Question 11

blood supply- thigh and knee ONLY

Answer 11

• external iliac artery
• femoral artery
• deep femoral artery
• medial circumflex femoral artery
• lateral circumflex femoral artery
• popliteal artery
• lateral superior/inferior genicular arteries
• medial superior/inferior genicular arteries

Question 12

venous drainage- thigh and knee ONLY

Answer 12

1. lateral superior/inferior genicular veins
2. medial superior/inferior genicular veins
3. popliteal vein
4. medial circumflex femoral vein
5. lateral circumflex femoral vein
6. femoral vein
7. external iliac vein
8. deep femoral vein
9. great saphenous vein