Posterior thigh and Popliteal Fossa

Question 1

What is the innervation to all of the posterior thigh muscles besides the short head of the biceps femoris M.?

Answer 1

Tibial division of sciatic N (L4-S3)

except short head: common fibular division of sciatic N. (L4-S2)

Question 2

Where is the pes anserinus and what three muscles attach to them?

Answer 2

Pes anserinus is the common attachment site of sartorius, gracilis, and semitendinosus Mm. at the anteromedial proximal tibia.

Question 3

What does the oblique popliteal ligament form off of and where is it located?

Answer 3

From the tendon of the semimembranosus M., from medial condyle of tibia to lateral (epicondyle?) of femur

Question 4

What forms the adductor hiatus?

Answer 4

Adductor magnus, between hamstring and adductor portions

Question 5

Where is the short head of the biceps femoris origin that is different from the rest of the posteior thigh muscles (ischial tuberosity) origins?

Answer 5

lateral lip of linea aspera

Question 6

What makes up the boundaries of the popliteal fossa? Diamond shape! (4)

Answer 6

1. Semitendinosus and semimembranosus superomedially
2. Biceps femoris superolaterally
3. Lateral head of gastrocnemius inferolaterally
4. medial head of gastrocnemius inferomedially

Question 7

What is inside the popliteal fossa (superficial to deep)?

Answer 7

Nerves, popliteal vein, lymph nodes and branches, popliteal artery and branches

Question 8

Where is the small saphenous vein compared to the popliteal A and V.?

Answer 8

extremely superficial, connecting to gluteal V.

Question 9

What are the four main arteries in the genicular anastomosis and which can be found anterially along the popliteus M.?

Answer 9

1. superior lateral genicular A
2. superior medial genicular A
3. inferior medial genicular A
4. inferior lateral genicular A
   3/4 will run along the popliteus M

Question 10

What artery connects the genicular and cruciate anastomosises?

Answer 10

the descending branch of the lateral circumflex femoral A.

Question 11

What forms the popliteal v?

Answer 11

anterior and posterior tibial veins

Question 12

What is the main innervation for the posterior supericial and deep muscles?

Answer 12

Tibial N

Question 13

What forms the sural N. which runs along the posterior leg with the small saphenous V.?

Answer 13

1. Medial sural cutaneous N from tibial N
2. Lateral sural cutaneous N from common fibular
3. sural communicating branch from lateral sural cutaneous N, connecting both