Muscle of the Foot

Question 1

The deep fascia of the foot that holds the foot together (considering the weight it bears) and protects the plantar surface from injury and supports the arch

Answer 1

Plantar Fascia

Question 2

The muscles of the foot are also considered extrinsic or intrinsic?

Answer 2

Intrinsic muscles

Question 3

What muscle is on the dorsum of the foot?

Answer 3

Extensor Digitorum Brevis

Question 4

What is the innervation of the extensor digitorum brevis?

Answer 4

Deep Fibular Nerve

Question 5

Origin and insertion of the extensor digitorum brevis

Answer 5

Origin: Calcaneus

Insertion: Base of proximal phalanx and toes.

Question 6

What is the name of the tendon that goes to the big toe?

Answer 6

Extensor Hallucis Brevis

Question 7

Action of the extensor digitorum brevis?

Answer 7

Extend toes 1-4

Question 8

How many muscle layers of the plantar surface of the foot are there?

Why are the individual muscles of little importance?

Answer 8

4

Moving toes individually doesn’t do very much

Question 9

All of the muscles of the plantar surface of the foot are innervated by the ____ nerve which divides into the _____ plantar nerve and the ______ plantar nerve

Answer 9

Tibial Nerve
Medial Nerve
Lateral Nerve

Question 10

Which nerve mostly innervates the superficial and medial muscles of the foot?
Which nerve mostly innervates the lateral and deep muscles of the foot?

Answer 10

Medial Plantar Muscle

Lateral Plantar Muscle

Question 11

The muscle on the surface of the foot that lies along the medial border of the foot and abducts the big toe

Answer 11

Abductor Hallucis

Question 12

Origin of the abductor hallucis

Answer 12

Origin: Medial Process of calcaneal tuberosity and flexor retinaculum

Insertion: Proximal phalanx of the big toe

Question 13

Innervation of the abductor hallucis

Answer 13

Medial Plantar Nerve

Question 14

Action of the abductor hallucis

Answer 14

Abducts the great toe, flexes it too

Question 15

The muscle that flexes the lateral 4 toes, its tendons split and attach to the midldle phalanges, allow the passage of the long flexor tendons to distal phalanges

Answer 15

Flexor Digitorum Brevis

Question 16

Origin and Insertion of the flexor digitorum brevis

Answer 16

Origin: Medial process of calcaneusl tuberosity

Insertion: Middle phalanges of 1 2 3 4 sometimes 5

Question 17

Plantar surface muscle that lies along the lateral border of the foot and fuses with the tendon of the flexor digiti minimi brevis

Answer 17

Abductor Digiti Minimi

Question 18

Origin and insertion of the abductor digiti minimi

Answer 18

Origin: Tuberosity of calcaneus

Insertion: Proximal phalynx of the toe

Question 19

Innervation of the abductor digiti minimi

Answer 19

Lateral Plantar Nerve

Question 20

Action of the abductor digiti minimi

Answer 20

Abduction and flexion

Question 21

Muscle in the second layer of the foot, small and inserts into the tendon of flexor digitorum longus. Helps in correcting the pull of FDL

Answer 21

Quadratus Plantae

Question 22

Origin and Insertion of the quadratus plantae

Answer 22

Origin: Calcaneus

Insertion: Tendon of FDL

Question 23

Innervation of the quadratus plantae

Answer 23

Lateral Plantar Nerve

Question 24

Action of the quadratus plantae

Answer 24

Helps in correcting movement of FDL

Question 25

Muscles in the second layer that is the 4 small muscles.

Answer 25

Lumbricals

Question 26

Origin and insertion of the lumbricals

Answer 26

Origin: Tendons of FDL Insertion: Base of proximal phalanx toes 2-5

Question 27

Action of the lumbricals

Answer 27

Flex the toes 2-5

Question 28

Innervation of the lumbricals (1st) 2nd, 3rd and 4th

Answer 28

Medial Plantar Nerve Lateral plantar nerve

Question 29

Muscle of the third later that has 2 heads, a lateral and a medial head, that are separated by the flexor hallucis longus

Answer 29

Flexor Hallucis Brevis

Question 30

Origin and insertion of the flexor hallucis brevis, joins with abuctor and adductor hallucis

Answer 30

Origin: Cuboid and lateral cuneiform Insertion: Proximal phalynx of great toe

Question 31

Innervation of the flexor hallucis brevis

Answer 31

Medial Plantar Nerve

Question 32

Action of the flexor hallucis brevis

Answer 32

Flexion of proximal phalynx

Question 33

Muscle in 3rd layer that has and oblique and transverse heads which combine and insert laterally onto proximal phalanx of big toe. Forms a 7 on the foot

Answer 33

Adductor Hallucis

Question 34

Origin and insertion of the adductor hallucis (tranverse and oblique)

Answer 34

Origin (oblique): base of metatarsal 2-4 and tendon of fibularis longus tranverse: metatarsal tranverse ligament toes of toes 345 Insertion: Proximal phalanx

Question 35

Innervation of the adductor hallucis

Answer 35

Lateral plantar nerve

Question 36

Action of the adductor hallucis

Answer 36

Adduction and flexion of the big toe

Question 37

The muscle in the 3rd layer which is just medial to the abductor digiti minimi brevis

Answer 37

Flexor Digiti Minimi brevis

Question 38

Origin and insertion of flexor digiti minimi brevis

Answer 38

Origin: 5th metatarsal, fibularis longus tendon Insertion: proximal phalanx of little toe

Question 39

Innervation of the flexor digiti minimi brevis

Answer 39

Lateral plantar nerve

Question 40

Action of the flexor digiti minimi brevis

Answer 40

Flex the little toe

Question 41

This layer of foot muscle contains the interossei

Answer 41

Deepest layer, 4th layer.

Question 42

The deep muscle of the foot that adduct the 3rd 4th and 5th toes toward the second toes

Answer 42

Plantar interossei (PAD)

Question 43

Which digit is the reference point in the foot?

Answer 43

2nd Digit

Question 44

Origin and insertion of the plantar interossei

Answer 44

Origin: Metatarsal 3 4 5 Insertion: Proximal phalanges 3 4 5

Question 45

Innervation of the plantar interossei

Answer 45

Lateral Plantar Nerve

Question 46

Action of the plantar interossei (PAD)

Answer 46

Adducting toes 3-5 towards 2nd toes

Question 47

The deep muscles of the foot that abduct the 2nd 3rd and 4th toes digits (DAB)

Answer 47

Dorsal interossei

Question 48

Origin and insertion of the dorsal interossei

Answer 48

Origin: On adjacent sides of metatarsals 1-5 (bipennate) Insertion: Proximal phalanx of 2,3,4

Question 49

Innervation of the dorsal interossei

Answer 49

Lateral Plantar Nerve