Anatomy II Lecture 14: Foot

Question 1

What is the blood supply of the dorsum of the foot?

Answer 1

• Anterior tibial artery via dorsalis pedis artery
• Arcuate artery: Gives off dorsal metatarsals to dorsal digitals
• Deep plantar artery

Question 2

What is the cutaneous innervation of the dorsum of the foot?

Answer 2

Superficial peroneal nerve

Question 3

What innervates the extensor hallucis brevis and extensor digitorum braves?

Answer 3

Lateral branch of the deep peroneal nerve

Question 4

What is innervated by the medial branch of the deep peroneal nerve?

Answer 4

Cutaneous innervation of the dorsum of the foot

Question 5

What nerve gives off lateral dorsal cutaneous nerve?

Answer 5

Sural nerve (Innervates the dorsum of the foot)

Question 6

What are the three nerves of the dorsum of the foot?

Answer 6

Superficial peroneal nerve
Deep peroneal nerve
Sural nerve

Question 7

What tendons pass through both retinaculas?

Answer 7

Tendons of peroneus longus and brevis

Question 8

What are the two retinacula?

Answer 8

superior peroneal and inferior peroneal

Question 9

What tendons are bound down by the extensor reinaculum?

Answer 9

Extensor digitorum
Extensor hallucis longus
Tibialis anterior

Question 10

What tendons are bound town by the flexor retinaculum?

Answer 10

Tibialis posterior
Flexor digitorum longus
Flexor hallucis longus
(Tom Dick and Harry)

Question 11

What are the three muscles of the dorsum of the foot?

Answer 11

Extensor digitorum brevis
Extensor hallucis brevis
Dorsal interossei

Question 12

What is the reference for the abductions of the toes?

Answer 12

Second toe

Question 13

What muscle abducts the toes?

Answer 13

Dorsal interossei

Question 14

What does the posterior tibial artery supply?

Answer 14

Sole fo the foot via the medial and lateral arteries

Question 15

What three nerves are the cutaneous supply for the sole of the foot?

Answer 15

Tibial nerve (Medial calcaneal, medial plantar, and lateral plantar)
Saphenous nerve
Sural nerve

Question 16

Tibial nerve via lateral and medial plantar nerves innervates what?

Answer 16

Motor functions of the sole of the foot ***

He says know this

Question 17

What are the superficial layers of the sole of the foot?

Answer 17

Skin and Plantar aponeurosis

Question 18

What is the first muscle layer of the sole of the foot?

Answer 18

Abductor hallucis
Flexor digitorum brevis
Abductor digit minimi

Question 19

What tendons are part of the first layer of tendons in the sole of the foot?

Answer 19

Flexor digitorum longus tendon

Flexor hallucis longus tendon

Question 20

What does the abudctor hallucis insert to?

Answer 20

Medial SESAMOID and base of proximal phalanx of GREAT TOE

Question 21

What does the flexor digitorum brevis attach to?

Answer 21

Sides of MIDDLE phalanges of digits 2-5

Question 22

What does the abductor digit minimi insert to?

Answer 22

Proximal phalanx of little toe

Question 23

What innervates the abductor hallucis

Answer 23

Medial plantar: S1-2

Question 24

What innervates the flexor digitorum brevis?

Answer 24

Medial Plantar: L5, S1-2

Question 25

What innervates the Abductor digiti minimi?

Answer 25

Lateral plantar: S2-3

Question 26

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

Answer 26

Quadratus plantae | Lubricals

Question 27

What is the function of the abductor hallucis

Answer 27

Abducts the great toe and help to flex MP joint

Question 28

What is inserted into the lateral edge of the tendon of the flexor digitorum longus?

Answer 28

Quadratus Plantae

Question 29

What helps to flex DIP joints of digits 2-5?

Answer 29

Quadratus Plantae

Question 30

What innervates Quadratus Plantae?

Answer 30

Lateral plantar S2-3

Question 31

What innervates lumbricals 2-4?

Answer 31

Lateral plantar nerve S2-3

Question 32

What innervates lumbrical 1?

Answer 32

Medial plantar nerve S2-3

Question 33

What is the action of the lumbricals?

Answer 33

Flexes the MP joints and extends the PIP and DIP joints of digits 2-5

Question 34

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

Answer 34

Adductor hallucis Flexor digit minimi brevis Flexor hallucis brevis

Question 35

What is the action of the flexor hallucis brevis?

Answer 35

Flexes proximal phalanx of first digit

Question 36

What is the action of the adductor hallucis?

Answer 36

Adducts the great toe at the MP joint

Question 37

What is the action of the digiti minimi brevis?

Answer 37

Flexes the PIP joint of the LITTLE toe

Question 38

What is the innervation of the flexor hallucis brevis?

Answer 38

Medial plantar nerve S2-S3

Question 39

What is the innervation of the adductor hallucis?

Answer 39

Lateral plantar S2-3

Question 40

What is the innervation of the flexor digiti minimi brevis?

Answer 40

Lateral plantar S2-3

Question 41

What three parts are part of the fourth layer of muscles of the foot?

Answer 41

Peroneus longus tendon Tibialis posterior tendon Interossei (Three plantar (adductors) and four dorsal (abductors))

Question 42

What are the functions of the four dorsal interossei?

Answer 42

Abudcts digits 2-4 and flexes the metatarsal phalangeal joints

Question 43

What are the functions of the three plantar interossei

Answer 43

Adducts digits 3-5 at the MP joints twoards the axis of the second toe Flexes the MP joints and extends the PIP and DIP joints of digits 3-5

Question 44

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

Answer 44

Lateral Plantar nerve S2-3