Lecture 6 - Posterior Thigh & Popliteal Fossa

Question 1

Features of proximal tibia (3)

Answer 1

• medial condyle
• lateral condyle
• tibial tuberosity
  (the tibia is medial and has a much larger proximal head than the fibula)

Question 2

Feature of the proximal fibula (1)

Answer 2

head

Question 3

Posterior thigh muscles (IV)

Answer 3

• biceps femoris (long head) and biceps femoris (short head)
• semitendinoseus
• semimebranosus

Question 4

Biceps femoris - long head: origin

Answer 4

ishcial tubersority

Question 5

Biceps femoris - long head: insertions (2)

Answer 5

• lateral condyle of tibia
• head of fibula

Question 6

Biceps femoris - long head: actions (3)

Answer 6

• knee flexion
• lateral rotation of tibia
• hip extension

Question 7

Biceps femoris - long head: innervations (2)

Answer 7

sciatic nerve -> tibial nerve

Question 8

Biceps femoris - short head: origin

Answer 8

linea aspera

Question 9

Biceps femoris - short head: insertions (2)

Answer 9

• lateral condyle of tibia
• head of fibula

Question 10

Biceps femoris - short head: actions (2)

Answer 10

• knee flexion
• medial rotation of tibia

Question 11

Biceps femoris - short head: innervations (2)

Answer 11

sciatic nerve -> common fibular nerve

Question 12

Semitendinosus: origin

Answer 12

ischial tuberosity

Question 13

Semitendinosus: insertion

Answer 13

proximal medial tibia

Question 14

Semitendinosus: actions (3)

Answer 14

• knee flexion
• medial rotation of tibia
• hip extension

Question 15

Semitendinosus: innervations (2)

Answer 15

sciatic nerve -> tibial nerve

Question 16

Semimembranosus: origin

Answer 16

ischial tuberosity

Question 17

Semimembranosus: insertion

Answer 17

medial condyle of tibia

Question 18

Semimembranosus: actions (3)

Answer 18

• knee flexion
• medial rotation of tibia
• hip extension

Question 19

Semimembranosus: innervations (2)

Answer 19

sciatic nerve -> tibial nerve

Question 20

What is the Pes Anserinus?

Answer 20

• “Goose’s foot” cause it looks like a goose’s foot
• combined tendons of 3 muscles inserting onto the proximal medial tibia

Question 21

What three muscles are part of the Pes Anserinus?

Answer 21

• sartorius
• gracilis
• semitendinosus

Question 22

What is the popliteal fossa?

Answer 22

the space located directly posterior to the knee joint

Question 23

What are the 5 borders of the popliteal fossa?

Answer 23

• superomedial
• superolateral
• inferomedial
• inferolateral
• floor

Question 24

What muscle makes the superomedial border of the popliteal fossa?

Answer 24

semimembranosus

Question 25

What muscle makes the superolateral border of the popliteal fossa?

Answer 25

biceps femoris (long head)

Question 26

What muscle makes the inferomedial border of the popliteal fossa?

Answer 26

gastrocnemius (medial head)

Question 27

What muscle makes the inferolateral border of the popliteal fossa? (3)

Answer 27

- gastrocnemius (lateral head) - plantaris - popliteus

Question 28

What structures makes the floor border of the popliteal fossa? (2)

Answer 28

posterior surfaces of femur & tibia

Question 29

What is in the popliteal fossa? (6)

Answer 29

- popliteal vein - poplitea artery - sciatic nerve - tibial nerve - common fibular nerve - deep popliteal lymph nodes

Question 30

Blood supply of the thigh and knee (first 4)

Answer 30

external iliac artery -> femoral artery -> deep femoral artery or popliteal artery

Question 31

Where does the blood go after the deep femoral artery? (2)

Answer 31

medial circumflex femoral artery or lateral circumflex femoral artery

Question 32

Where does the blood go after the politeal artery? (4)

Answer 32

- medial superior genicular artery - lateral superior genicular artery - medial inferior genicular artery - later inferior genicular artery

Question 33

Venous drainage of the thigh and knee (first 5)

Answer 33

external iliac vein <- femoral vein <- deep femoral vein or great saphenous vein or popliteal vein

Question 34

where does the blood come from before going into the deep femoral vein? (2)

Answer 34

medial circumflex femoral vein or lateral circumflex femoral vein

Question 35

where does the blood come from before going into the popliteal vein? (4)

Answer 35

- medial superior genicular vein - lateral superior genicular vein - medial inferior genicular vein - later inferior genicular vein