L11 - Foot

Question 1

**what is the blood supply to the dorsum of the foot

Answer 1

• anterior tibial artery via dorsalias pedis artery
• arcuate artery (gives off dorsal metatarsals to dorsal digitalis)
• deep plantar artery

Question 2

**what is the nerve supply to the dorsum of foot

Answer 2

• superficial peroneal nerve
• deep peroneal nerve
• sural nerve

Question 3

**describe the superficial peroneal nerve

Answer 3

• gives rise to medial and intermediate dorsal cutaneous nerves
• cutaneous

Question 4

**describe the deep peroneal nerve

Answer 4

• lateral branch is motor to intrinsic muscles on dorsum
  = extensor hallucis brevis
  = extensor digitorum brevis
• medial branch is cutaneous

Question 5

**describe the sural nerve

Answer 5

• gives off lateral dorsal cutaneous nerve

Question 6

**describe the peroneal retinacular complex

Answer 6

composed of superior and inferior peroneal

- tendons of both peroneus longus and brevis pass through both of these retinacula

Question 7

**describe the extensor retinaculum:

Answer 7

• Y shaped complex with stem of Y on lateral side of ankle

- for tendons of extensor digitorum longus, extensor hallucis longus, and tibialis anterior

Question 8

describe the flexor retinaculum

Answer 8

• for tendons of tibialis posterior, flexor digitorum longus, and flexor hallucis longus

Question 9

**what muscles are in the dorsum of the foot? describe them

Answer 9

• extensor digitorum brevis
• extensor hallucis brevis: sometimes considered part of extensor digitorum brevis
• dorsal interossei: abductors; second toe is reference

Question 10

**Sole of foot: describe the blood supply:

Answer 10

• posterior tibial artery: medial and lateral lantar arteries
• perforating arteries

Question 11

++describe the nerve supply of the sole of the foot: cutaneous

Answer 11

• tibial nerve: medial calcaneal; medial plantar; lateral plantar// saphenous nerve// sural nerve

Question 12

++describe the nerve supply of the sole of the foot: motor

Answer 12

• tibial nerve via lateral and medial plantar nerves

Question 13

d++escribe the superficial layers of sole of foot

Answer 13

• skin

- plantar aponeurosis

Question 14

++describe first muscle layer of sole of foot

Answer 14

• abductor hallucis
• flexor digitorum brevis
• abductor digiti minimi

Question 15

++describe the tendons in first layer of sole of foot

Answer 15

• flexor digitorum longus tendon

- flexor hallucis longus tendon

Question 16

++describe the second muscle layer of the sole of the foot

Answer 16

• quadratus plantae

- lumbricals

Question 17

++describe the third muscle layer of the sole of the foot

Answer 17

• flexor hallucis longus tendon: passes between sesamoid bones in tendons of flexor hallucis brevis
• adductor hallucis
• flexor digiti minimi brevis

Question 18

++describe the 4th layer of the sole of the foot

Answer 18

• peroneus longus tendon
• tibialis posterior tendon
• interossei: three plantar (add); four dorsal (abd)