Foot

Question 1

What innervates the abductor digiti minimi?

Answer 1

Lateral plantar nerve

Question 2

What is the main action of the abductor digiti minimi?

Answer 2

Abducts and flexes 5th digit (pinky toe)

Question 3

What innervates the abductor hallucis?

Answer 3

Medial plantar nerve

Question 4

What is the main action of the abductor hallucis?

Answer 4

Abducts and flexes 1st digit (big toe).

Question 5

What innervates the adductor hallucis?

Answer 5

Deep branch of lateral plantar nerve

Question 6

What is the main action of the adductor hallucis?

Answer 6

Adducts 1st digit, maintains transverse arch of foot

Question 7

What innervates the dorsal interossei (4 muscles)?

Answer 7

Lateral plantar nerve

Question 8

What is the main action of the dorsal interossei (4 muscles)?

Answer 8

Abducts 2nd through 4th toes, flex metatarsophalangeal joints, and extend phalanges

Question 9

What innervates the extensor digitorum brevis and extensor hallucis brevis?

Answer 9

Deep fibular nerve

Question 10

What are the main actions of the extensor digitorum brevis and extensor hallucis brevis?

Answer 10

Aids the extensor digitorum longus in extending the 4 medial digits at the metatarsophalangeal and interphalangeal joints

Question 11

What innervates the flexor digiti minimi brevis?

Answer 11

Superficial branch of the lateral plantar nerve

Question 12

What is the main action of the flexor digiti minimi brevis?

Answer 12

Flexes proximal phalanx of 5th digit

Question 13

What innervates the flexor digitorum brevis?

Answer 13

Medial plantar nerve

Question 14

What is the main action of the flexor digitorum brevis?

Answer 14

Flexes the 2nd through 5th digits

Question 15

What innervates the flexor hallucis brevis?

Answer 15

Medial plantar nerve

Question 16

What is the main action of the flexor hallucis brevis?

Answer 16

Flexes proximal phalanx of 1st digit

Question 17

What innervates the lumbricals?

Answer 17

Medial One: medial plantar nerve

Lateral Three: lateral plantar nerve

Question 18

What is the main action of the lumbricals?

Answer 18

Flexes proximal phalanges at MTP joint

Extends phalanges at PIP and DIP joints

Question 19

What innervates the plantar interossei (3 muscles)?

Answer 19

Lateral plantar nerve

Question 20

What is the main action of the plantar interossei (3 muscles)?

Answer 20

Adducts digits 2-4

Flex metatarsophalangeal joint and extend phalanges

Question 21

What innervates the quadratus plantae?

Answer 21

Lateral plantar nerve

Question 22

What is the main action of the quadratus plantae?

Answer 22

Corrects for oblique pull of flexor digitorum longus tendon, thus assists in flexion of toes

Question 23

Arterial supply to the foot is delivered via two arteries:

Answer 23

Dorsalis pedis (a continuation of the anterior tibial artery)

Posterior tibial

Question 24

Describe the course of the sciatic nerve and innervated muscles.

Answer 24

The sciatic splits in the popliteal fossa to form the:

Tibial nerve – the muscles of the posterior leg (calf muscles), and some of the intrinsic muscles of the foot.

Common fibular nerve – the muscles of the anterior leg, lateral leg, and the remaining intrinsic foot muscles.

Question 25

Describe the termination of the common fibular nerve.

Answer 25

The common fibular nerve terminates by dividing into the superficial fibular and deep fibular nerves

Question 26

Describe the termination of the tibial nerve.

Answer 26

The tibial nerve divides on the bottom of the foot into the medial and lateral plantar nerves.

Question 27

What nerves supply the dorsum of the foot?

Answer 27

The superficial fibular nerve (not toes) | The deep fibular nerve (1st and 2nd toes)

Question 28

What are the 3 muscle layers of the foot?

Answer 28

AFA 2Muscles 2Tendons FAF

Question 29

Tom Dick and nervous Harry

Answer 29

Order from front of foot toward heel: ``` Tibialis posterior Flexor digitorum longus tendon tibial artery Tibial Nerve Flexor hallucis longus tendon ```

Question 30

Talar Bones

Answer 30

``` Tiger Cubs Need MILC (superior, then clockwise on right foot) Talus Calcaneus Navicular Medial cuneiform Intermediate cuneiform Lateral cuneiform Cuboid ```