Quiz 6

Question 1

What are the borders of the borders of the popliteal fossa?

Answer 1

superomedial: semitendinosus and semimembranosus
superolateral: biceps femoris
inferomedial: medial head of gastocnemius
inferolateral: lateral head of gastrocnemius and plantaris

Question 2

the popliteal fascia is continuous with?

Answer 2

the fascia lata superiorly

the crural fascia inferiorly

Question 3

what makes up the floor of the popliteal fossa?

Answer 3

popliteal surface of femur
knee joint capsule
oblique popliteal ligament
popliteus muscle

Question 4

what are the superficial contents of the popliteal fossa?

Answer 4

skin
subcutaneous tissue
superficial popliteal lymph nodes
posterior femoral cutaneous nerve
small saphenous vein
medial and lateral sural cutaneous nerves

Question 5

what are the deep contents of the popliteal fossa?

Answer 5

deep popliteal lymph nodes
tibial and common fibular nerves
popliteal vein and its tributaries
popliteal artery and its branches

Question 6

where is does the popliteal artery start and terminate? what are its terminal branches?

Answer 6

starts at adductor hiatus

terminates at the soleal line where it bifurcates into the anterior and posterior tibial arteries

Question 7

when does the popliteal artery develop?

Answer 7

weeks 6-7 in utero

Question 8

what are the branches of the popliteal artery?

Answer 8

superior muscular branches
superior medial genicular artery
superior lateral genicular artery
middle genicular artery
sural branches
inferior medial genicular artery
inferior lateral genicular artery

Question 9

which branch of the popliteal artery does NOT contribute to the genicular anastomosis?

Answer 9

middle genicular artery

Question 10

what 9 branches contribute to the genicular anastomosis?

Answer 10

descending branch of lateral circumflex femoral a.
descending genicular a.
superior medial genicular a.
superior lateral genicular a.
inferior medial genicular a.
inferior lateral genicular a.
circumflex fibular a.
recurrent branch of anterior tibial a.
posterior recurrent tibial a.

Question 11

where is the popliteal artery located within the fossa?

Answer 11

deep to the tibial nerve and popliteal v.

Question 12

what tributary of the popliteal vein enters the popliteal fossa?

Answer 12

small saphenous v.

Question 13

where does the small saphenous v. originate and what is it a continuation of?

Answer 13

posterior to the lateral malleolus

continuation of the lateral marginal v.

Question 14

what nerve does the small saphenous v. travel with?

Answer 14

sural n. distally

medial sural cutaneous proximally

Question 15

what does the sural n. innervate?

Answer 15

ONLY cutaneous innervation of skin of posterior/lateral calf

Question 16

what is the rami of the tibial nerve?

Answer 16

ventral/anterior divisions of ventral rami L4-S3

Question 17

what muscle compartment does the tibial n. innervate? what muscles make up this compartment?

Answer 17

posterior leg compartment

gastrocnemius, plantaris, popliteus, and soleus

Question 18

which nerve is a cutaneous branch off the tibial n. and what does it innervate?

Answer 18

medial sural cutaneous n.

innervates skin inferior to the lateral aspect of the popliteal fossa

Question 19

what is the rami of the common fibular n.?

Answer 19

dorsal/posterior divisions of ventral rami L4-S2

Question 20

which nerve is a cutaneous branch off the common fibular n. and what does it innervate?

Answer 20

lateral sural cutaneous n.

innervates skin on the superolateral part of the posterior aspect of the leg

Question 21

after leaving the popliteal fossa, the common fibular n. divides into what 2 terminal branches around the neck of the fibula?

Answer 21

superficial and deep fibular nerves

Question 22

what is the rami of the posterior femoral cutaneous nerve?

Answer 22

dorsal and ventral divisions of ventral rami S1-S3

Question 23

what does the posterior femoral cutaneous n. innervate?

Answer 23

skin of posterior thigh, popliteal fossa, and upper 1/3 of calf

Question 24

where are the superficial and deep popliteal lymph nodes located? what do they drain into?

Answer 24

superficial: near termination of small saphenous v.
deep: close to popliteal vessels
drain into deep inguinal nodes

Question 25

what structure on the deepest part of the popliteal fossa can be lacerated/compressed by the sharp edges of a posteriorly displaced distal fragment?

Answer 25

popliteal artery

Question 26

what is a popliteal/baker’s cyst?

Answer 26

a mass behind the knee that is can be caused by overproduction of synovial fluid that spreads into the gastrocnemius-semimembranosus bursa

Question 27

what 3 tendons comprise the pes anserinus insertion and what muscle compartments do they come from? what are their innervations?

Answer 27

sartorius - anterior compartment of thigh - femoral n.
gracilis - medial compartment of thigh - oburator n.
semitendinosus - posterior compartment of thigh - tibial division of sciatic n.

Question 28

where is the pes anserinus located? dermatome?

Answer 28

anteromedial aspect of proximal tibia

L3-L4 dermatome

Question 29

what is pes anserinus bursitis?

Answer 29

inflammation of the bursa located between the pes anserinus and proximal tibia

Question 30

what structures are superficial to the pes anserinus? deep?

Answer 30

superficial = saphenous n. and great saphenous v.
deep = MCL

Question 31

what cutaneous nerve mainly supplies the pes anserinus

Answer 31

saphenous n.