Foot Flashcards

1
Q

What innervates the abductor digiti minimi?

A

Lateral plantar nerve

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2
Q

What is the main action of the abductor digiti minimi?

A

Abducts and flexes 5th digit (pinky toe)

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3
Q

What innervates the abductor hallucis?

A

Medial plantar nerve

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4
Q

What is the main action of the abductor hallucis?

A

Abducts and flexes 1st digit (big toe).

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5
Q

What innervates the adductor hallucis?

A

Deep branch of lateral plantar nerve

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6
Q

What is the main action of the adductor hallucis?

A

Adducts 1st digit, maintains transverse arch of foot

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7
Q

What innervates the dorsal interossei (4 muscles)?

A

Lateral plantar nerve

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8
Q

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

A

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

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9
Q

What innervates the extensor digitorum brevis and extensor hallucis brevis?

A

Deep fibular nerve

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10
Q

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

A

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

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11
Q

What innervates the flexor digiti minimi brevis?

A

Superficial branch of the lateral plantar nerve

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12
Q

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

A

Flexes proximal phalanx of 5th digit

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13
Q

What innervates the flexor digitorum brevis?

A

Medial plantar nerve

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14
Q

What is the main action of the flexor digitorum brevis?

A

Flexes the 2nd through 5th digits

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15
Q

What innervates the flexor hallucis brevis?

A

Medial plantar nerve

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16
Q

What is the main action of the flexor hallucis brevis?

A

Flexes proximal phalanx of 1st digit

17
Q

What innervates the lumbricals?

A

Medial One: medial plantar nerve

Lateral Three: lateral plantar nerve

18
Q

What is the main action of the lumbricals?

A

Flexes proximal phalanges at MTP joint

Extends phalanges at PIP and DIP joints

19
Q

What innervates the plantar interossei (3 muscles)?

A

Lateral plantar nerve

20
Q

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

A

Adducts digits 2-4

Flex metatarsophalangeal joint and extend phalanges

21
Q

What innervates the quadratus plantae?

A

Lateral plantar nerve

22
Q

What is the main action of the quadratus plantae?

A

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

23
Q

Arterial supply to the foot is delivered via two arteries:

A

Dorsalis pedis (a continuation of the anterior tibial artery)

Posterior tibial

24
Q

Describe the course of the sciatic nerve and innervated muscles.

A

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
Q

Describe the termination of the common fibular nerve.

A

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

26
Q

Describe the termination of the tibial nerve.

A

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

27
Q

What nerves supply the dorsum of the foot?

A

The superficial fibular nerve (not toes)

The deep fibular nerve (1st and 2nd toes)

28
Q

What are the 3 muscle layers of the foot?

A

AFA

2Muscles 2Tendons

FAF

29
Q

Tom Dick and nervous Harry

A

Order from front of foot toward heel:

Tibialis posterior
Flexor digitorum longus tendon
tibial artery
Tibial Nerve
Flexor hallucis longus tendon
30
Q

Talar Bones

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