Sole of Foot Muscles

Question 1

Abductor Hallucis

Origin

Answer 1

• Medial tubercle of tuberosity of calcaneus
• flexor retinaculum
• plantar aponeurosis

Question 2

Abductor Hallucis

Insertion

Answer 2

-Medial side of base of proximal phalanx of 1st

digit

Question 3

Abductor Hallucis

Innervation

Answer 3

-Medial plantar nerve (S2, S3)

Question 4

Abductor Hallucis

Action

Answer 4

-Abducts and flexes 1st digit (great toe/hallux)

Question 5

Abductor Digiti Minimi

Origin

Answer 5

-Medial and lateral tubercles of tuberosity of
calcaneus
-plantar aponeurosis
-intermuscularsepta

Question 6

Abductor Digiti Minimi

Insertion

Answer 6

-Lateral side of base of proximal phalanx of 5th digit

Question 7

Abductor Digiti Minimi

Innervation

Answer 7

-Lateral plantar nerve (S2, S3)

Question 8

Abductor Digiti Minimi

Action

Answer 8

-Abducts and flexes the 5th digit

Question 9

Flexor Digitorum Brevis

Origin

Answer 9

• Tuberosity of calcaneus
• plantar aponeurosis
• intermuscular septa

Question 10

Flexor Digitorum Brevis

Insertion

Answer 10

-Both sides of middle phalanges of lateral four digits

Question 11

Flexor Digitorum Brevis

Innervation

Answer 11

-Medial plantar nerve (S2, S3)

Question 12

Flexor Digitorum Brevis

Action

Answer 12

-Flexes lateral four digits

Question 13

Quadratus Plantae

Origin

Answer 13

-Medial and lateral margins of plantar surface of

calcaneus

Question 14

Quadratus Plantae

Insertion

Answer 14

-Tendon of flexor digitorum longus

Question 15

Quadratus Plantae

Innervation

Answer 15

-Lateral plantar nerve (S2, S3)

Question 16

Quadratus Plantae

Action

Answer 16

-Assists flexor digitorum longus in flexing lateral four digits

Question 17

Adductor Hallucis

Origin

Answer 17

Oblique head: bases of the 2nd-4th metatarsals

Transverse head: plantar ligaments of
metatarsophalangeal (MTP) joints

Question 18

Adductor Hallucis

Insertion

Answer 18

-Tendons of both heads attach to lateral side of base of proximal phalanx of 1st digit

Question 19

Adductor Hallucis

Innervation

Answer 19

-Deep branch of lateral plantar nerve (S2, S3)

Question 20

Adductor Hallucis

Action

Answer 20

• -Flexes and adducts the 1st digit at MTP joint

- Supports the transverse arch of foot

Question 21

Flexor Hallucis Brevis

Origin

Answer 21

-Plantar surfaces of cuboid and lateral cuneiforms

Question 22

Flexor Hallucis Brevis

Insertion

Answer 22

-Both sides of base of proximal phalanx of 1st digit

Question 23

Flexor Hallucis Brevis

Innervation

Answer 23

-Medial plantar nerve (S2, S3)

Question 24

Flexor Hallucis Brevis

Action

Answer 24

-Flexes proximal phalanx of 1st digit

Question 25

Flexor Digiti Minimi Brevis | Origin

Answer 25

-Base of 5th metatarsal

Question 26

Flexor Digiti Minimi Brevis | Insertion

Answer 26

-Base of proximal phalanx of 5th digit

Question 27

Flexor Digiti Minimi Brevis | Innervation

Answer 27

-Superficial branch of lateral plantar nerve (S2, S3)

Question 28

Flexor Digiti Minimi Brevis | Action

Answer 28

-Flexes proximal phalanx of 5th digit

Question 29

Lumbricals | Origin

Answer 29

-Tendons of flexor digitorum longus

Question 30

Lumbricals | Insertion

Answer 30

-Medial aspect of expansion over lateral four digits

Question 31

Lumbricals | Innervation

Answer 31

- Medial one: medial plantar nerve (S2, S3) | - Lateral three: lateral plantar nerve (S2, S3)

Question 32

Lumbricals | Action

Answer 32

-Flexes MTP joints and extends IP joints of lateral | four digits

Question 33

Plantar Interossei | Origin

Answer 33

-Bases of medial sides of metatarsals 3-5

Question 34

Plantar Interossei | Insertion

Answer 34

-Medial sides of bases of phalanges of 3rd-5th digits

Question 35

Plantar Interossei | Innervation

Answer 35

-Lateral plantar nerve (S2, S3)

Question 36

Plantar Interossei | Action

Answer 36

-Adducts digits (3-5) and flexes (MTP) joints

Question 37

Dorsal Interossei | Origin

Answer 37

-Adjacent sides of metatarsals 1-5

Question 38

Dorsal Interossei | Insertion

Answer 38

- 1st: medial side of proximal phalanx of 2nd digit | - 2nd-4th: lateral sides of 2nd-4th digits

Question 39

Dorsal Interossei | Innervation

Answer 39

-Lateral plantar nerve (S2, S3)

Question 40

Dorsal Interossei | Action

Answer 40

-Abducts digits (2-4) and flexes (MTP) joints