Lecture 11 - Foot

Question 1

What is the blood supply and innervation (differentiate cutaneous and motor) of the dorsum of the foot?

RL11 S32

Answer 1

Blood supply:

• anterior tibial artery
• arcuate artery
• deep plantar artery

Nerve supply:

• superficial peroneal nerve (cutaneous)
• deep peroneal nerve (lateral is motor; medial is cutaneous)
• sural nerve (cutaneous)

Question 2

What is the extensor retinaculum and what tendons does it enclose?

RL11 S32

Answer 2

“Y” shaped tendon with stem on lateral side

Encloses:

• extensor digitorum longus
• extensor hallucis longus
• tibialis anterior

Question 3

What are the muscles of the dorsum of the foot?

RL11 S32

Answer 3

• extensor digitorum brevis
• extensor hallicis brevis
• dorsal interossei

Question 4

What is the blood supply and innervation of the sole of the foot?

RL11 S33

Answer 4

Blood supply:

• posterior tibial artery
• perforating arteries

Cutaneous innervation:

• tibial nerve
• saphenous nerve
• sural nerve

Motor:
-tibial nerve (lateral and medial plantar)

Question 5

What are the muscles of the first layer of the sole of the foot?

RS11 L35

Answer 5

• Abductor hallucis
• Flexor digitorum brevis
• Abductor digiti minimi

Question 6

What are the muscles of the second layer of the sole of the foot?

RS11 L36

Answer 6

• quadratus plantae

- lumbricals

Question 7

What are the muscles of the third layer of the sole of the foot?

RS11 L37

Answer 7

• flexor hallucis brevis
• adductor hallucis
• flexor digiti minimi brevis

Question 8

What are the muscles of the fourth layer of the sole of the foot?

RS11 L38

Answer 8

• dorsal interossei

- plantar interossei

Question 9

What is the axis of abduction and adduction in the foot?

RL11 S39

Answer 9

The second toe