Lab 17-19: Posterior Compartment of Leg

Question 1

most frequent termination of small saphenous v

Answer 1

popliteal v in the back of knee
- however, may continue into thigh and terminate in accessory saphenous v or deep veins of posterior compartment of thigh

Question 2

what n. is formed by the union between medial sural cutaneous n and the peroneal communicating branch of lateral sural cutaneous n.

Answer 2

sural n.

Question 3

origin of peroneal communicating branch of lateral sural cutaneous n.

Answer 3

branch of common peroneal n.

Question 4

origin of medial sural cutaneous n.

Answer 4

branch of tibial n.

Question 5

what n. is found b/w the two heads of the gastrocnemius

Answer 5

medial sural cutaneous n.

Question 6

fabella

Answer 6

• a sesamoid bone in the lateral head of the gastrocnemius m.
• found in 3-5% of cases

Question 7

n. supply to gastrocnemius

Answer 7

sural branch of tibial n.

Question 8

blood supply to gastrocnemius

Answer 8

sural branch of popliteal a

Question 9

tendon of gastrocnemius

Answer 9

tendo calcaneus

Question 10

tendon located b/w soleus and gastrocnemius

Answer 10

tendon of plantaris

Question 11

insertion of tendon of plantaris

Answer 11

calcaneus

Question 12

triceps surae

Answer 12

soleus and gastrocnemius

Question 13

the tendon of origin of the popliteus lies _________ to the arcuate popliteal ligament of knee joint

Answer 13

inferior

Question 14

what does the bundle between the flexor hallucis longus and flexor digitorum longus contain?

Answer 14

neurovascular bundle containing the posterior tibial vessels and the tibial n.

Question 15

the popliteal a. terminates by …

Answer 15

giving off the anterior and posterior tibial arteries

Question 16

the posterior tibial recurrent a is a branch off of …

Answer 16

anterior tibial a.

Question 17

from where does the circumflex fibular a. usually originate?

Answer 17

posterior tibial a.

Question 18

course of the circumflex fibular a.

Answer 18

courses laterally through the soleus and around the neck of the fibula to join the circumpatellar anastomosis

Question 19

second branch off the posterior tibial a.

Answer 19

tibial nutrient a. (goes directly into bone) OR peroneal a.

Question 20

largest branch of posterior tibial a.

Answer 20

peroneal a.

Question 21

where would you locate the communicating branch of the posterior tibial a. ?

Answer 21

3 or 4 cm superior to the distal end of the tibia

- this branch courses deep to the tendon of flexor hallucis longus and connect posterior tibial with the peroneal a.

Question 22

what is the origin of the posterior medial malleolar a? posterior lateral malleolar a?

Answer 22

• posterior tibial

- peroneal a.

Question 23

separating the bellies of the flexor hallucis longus and flexor digitorum longus, what m. do you expose?

Answer 23

tibialis posterior m.