Sacral Plexus Part 3 (Tibial Nerve)

Question 1

What roots contribute to the tibial nerve?

Answer 1

L4-S3

Question 2

T/F: the tibial nerve is larger than the common fibular nerve

Answer 2

True

Question 3

What muscles are supplied by the tibial nerve fibers while still combined with the common fibular nerve?

Answer 3

biceps femoris, semitendinosus, semimembranosus, and adductor magnus (hamstrings)

Question 4

What joint does the tibial nerve give off articular branches to?

Answer 4

the knee joint

Question 5

Where does the tibial nerve give off articular fibers to the knee?

Answer 5

popliteal fossa

Question 6

In addition to articular branches, the tibial nerve gives off muscular branches in the popliteal fossa. What muscles are supplied by these muscular branches?

Answer 6

(superficial posterior compartment muscles) popliteus, gastrocnemius (both heads), soleus, and plantaris

Question 7

What branch of the tibial nerve gives rise to the interosseous nerve of the leg?

Answer 7

popliteal branch

Question 8

The interosseous nerve of the leg travels inferior along the posterior surface of the interosseous membrane and carries sensory info from where?

Answer 8

the tibial periosteum, ankle, and tibiofibular joints

Question 9

what kind of branches does the tibial nerve give off in the leg?

Answer 9

muscular branches and sensory branches

Question 10

What muscles are supplied by the muscular branches given off by the tibial nerve in the leg?

Answer 10

flexor digitorum longus and flexor hallucis longus

Question 11

What is the name of the sensory branches given off in the leg by the tibial nerve?

Answer 11

medial calcaneal branches

Question 12

What area is supplied by the medial calcaneal branches of the tibial nerve?

Answer 12

skin over the medial heel

Question 13

After the tibial nerve travels around the medial malleolus to the plantar surface of the foot, what does it divide into?

Answer 13

two terminal branches: medial plantar nerve and lateral plantar nerve

Question 14

Where does the medial plantar nerve send motor fibers to?

Answer 14

adductor halluces, flexor digitorum brevis, and flexor brevis before dividing.

Question 15

What does the medial plantar divide into?

Answer 15

common plantar digital nerves

Question 16

Where do the common plantar digital nerves send motor info to?

Answer 16

lubricals 1 and 2

Question 17

What nerve(s) supply sensory info to the skin between the toes by way of proper plantar digital nerves?

Answer 17

common plantar digital nerve

Question 18

What does the lateral plantar nerve divide into?

Answer 18

superficial and deep branches

Question 19

What is supplied by the superficial branch of the lateral plantar nerve?

Answer 19

skin around the 5th digit

Question 20

Where does the deep branch of the lateral plantar nerve send motor fibers?

Answer 20

adductor halluces, flexor digiti minimi brevis, lateral lumbricals, and interossei muscles

Question 21

What clinical consideration of the tibial nerve involves difficulty flexing the toes or ankle?

Answer 21

flexor paralysis (although, latreal compartment muscles will contribute to plantar flexion)

Question 22

What clinical consideration of the tibial nerve usually involves 1 or 2 toes and typically involves fascial issues as well?

Answer 22

hammer toe

Question 23

In addition to hammer toe and flexor paralysis, what other clincal consideration was mentioned in class that is associated with the sacral plexus?

Answer 23

claw foot