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SHB Exam 3 > Foot > Flashcards

Flashcards in Foot Deck (30):
1

What innervates the abductor digiti minimi?

Lateral plantar nerve

2

What is the main action of the abductor digiti minimi?

Abducts and flexes 5th digit (pinky toe)

3

What innervates the abductor hallucis?

Medial plantar nerve

4

What is the main action of the abductor hallucis?

Abducts and flexes 1st digit (big toe).

5

What innervates the adductor hallucis?

Deep branch of lateral plantar nerve

6

What is the main action of the adductor hallucis?

Adducts 1st digit, maintains transverse arch of foot

7

What innervates the dorsal interossei (4 muscles)?

Lateral plantar nerve

8

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

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

9

What innervates the extensor digitorum brevis and extensor hallucis brevis?

Deep fibular nerve

10

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

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

11

What innervates the flexor digiti minimi brevis?

Superficial branch of the lateral plantar nerve

12

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

Flexes proximal phalanx of 5th digit

13

What innervates the flexor digitorum brevis?

Medial plantar nerve

14

What is the main action of the flexor digitorum brevis?

Flexes the 2nd through 5th digits

15

What innervates the flexor hallucis brevis?

Medial plantar nerve

16

What is the main action of the flexor hallucis brevis?

Flexes proximal phalanx of 1st digit

17

What innervates the lumbricals?

Medial One: medial plantar nerve
Lateral Three: lateral plantar nerve

18

What is the main action of the lumbricals?

Flexes proximal phalanges at MTP joint
Extends phalanges at PIP and DIP joints

19

What innervates the plantar interossei (3 muscles)?

Lateral plantar nerve

20

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

Adducts digits 2-4
Flex metatarsophalangeal joint and extend phalanges

21

What innervates the quadratus plantae?

Lateral plantar nerve

22

What is the main action of the quadratus plantae?

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

23

Arterial supply to the foot is delivered via two arteries:


Dorsalis pedis (a continuation of the anterior tibial artery)

Posterior tibial

24

Describe the course of the sciatic nerve and innervated muscles.

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.

25

Describe the termination of the common fibular nerve.

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

26

Describe the termination of the tibial nerve.

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

27

What nerves supply the dorsum of the foot?

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

28

What are the 3 muscle layers of the foot?

AFA

2Muscles 2Tendons

FAF

29

Tom Dick and nervous Harry

Order from front of foot toward heel:

Tibialis posterior
Flexor digitorum longus tendon
tibial artery
Tibial Nerve
Flexor hallucis longus tendon

30

Talar Bones

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