Posterior Thigh and Popliteal Fossa

Question 1

What is the Pes Anserinus?

Answer 1

Area of conjoined tendons of gracilis, semitendinous, and sartorius muscles.

Where these three muscles insert onto the tibia.

Question 2

Pes bursitis

Answer 2

Bursa underlying the pes anserinus becomes irritated from overuse (common in athletes)

Causes inflammation, pain, and tenderness of medial knee

Question 3

Semimembranosus

Answer 3

Extend thigh
Flex leg

Tibial division of sciatic

Question 4

Biceps femoris

Answer 4

Long head:
Flex leg; Extend thigh
Tibial division sciatic

Short head:
Flex leg
Common fibular branch sciatic

Question 5

Adductor magnus (hamstring portion)

Answer 5

Extend thigh

Tibial division of sciatic

Question 6

Arrange these popliteal fossa contents from superficial to deep:

a. Popliteal vein and lymph nodes
b. Tibial branch and common fibular branch of sciatic
c. Popliteal artery

Answer 6

b, a, c

Question 7

Popliteal artery is a continuation of what artery?

a. Tibial artery
b. Sciatic artery
c. Femoral artery
d. Genicular artery

Answer 7

c. Femoral

Question 8

What does popliteal artery branch into?

Answer 8

Posterior tibial artery

Anterior tibial artery

Question 9

What arteries make up the Genicular anastomoses?

Answer 9

Descending branch of lateral femoral circumflex artery
Superior lateral genicular artery
Superior medial genicular artery
Inferior lateral genicular artery
Inferior medial genicular artery

GADIISS

Question 10

What is the clinical significance of the Genicular anastomoses?

Answer 10

Important circulation that bypasses the popliteal artery when knee fully flexed too long or the popliteal vessels are narrowed or occluded.

Question 11

Semitendinous

Answer 11

Extend thigh
Flex leg (Medially rotate)

Tibial division of sciatic nerve