Ankle And Foot Muscles

Question 1

Extensors Digitorum Brevis Origin

Answer 1

Anterior part of dorsal surface of calcaneus, anterior and medial to lateral malleolus, inferior extensors retinaculum

Question 2

Extensor Digitorum Brevis Insertion

Answer 2

Lateral 3 tendons attach to tendons of Extensor Digitorum Longus to digits 2-4

Question 3

Extensor Digitorum Brevis action

Answer 3

• Extend toes 2-4 at MTP joint

- Assist Ext. Dig. Longus

Question 4

Extensor Digitorum Brevis innervation

Answer 4

Deep peroneal n. (L5-S1)

Question 5

Extensor Hallucis Brevis origin

Answer 5

(Same as Ext. Dig. Brevis)

Anterior part of dorsal surface of calcaneus, anterior and medial to lateral malleolus, inferior extensor retinaculum

Question 6

Extensor Hallucis Brevis Insertion

Answer 6

Medial tendon of 4 tendons to base of proximal phalanx of hallux

Question 7

Extensor Hallucis Brevis action

Answer 7

• Extend hallux at MTP joint

- Assist Ext. Hallucis Longus

Question 8

Extensor Hallucis Brevis Innervation

Answer 8

Deep Peroneal n. (L5-S1)

Question 9

Muscles on the dorsum of the foot

Answer 9

• extensor Digitorum Brevis

- Extensor Hallucis Brevis

Question 10

Muscles on the 1st layer of the sole of the foot

Answer 10

• Abductor Hallucis
• Flexor Digitorum Brevis
• Abductor Digiti minimi

Question 11

Abductor Hallucis origin

Answer 11

• Medial process of tuber calcaneus
• flexor retinaculum
• plantar aponeurosis

Question 12

Abductor Hallucis Insertion

Answer 12

Medial side of base of proximal phalanx of hallux

Question 13

Abductor Hallucis action

Answer 13

Abducts and flexes hallux

Question 14

Abductor Hallucis innervation

Answer 14

Medial Plantar n. (S1, S2)

Question 15

Flexor Digitorum Brevis Origin

Answer 15

• Medial process of tuber calcaneus
• Plantar aponeurosis
• Intermuscular septum

Question 16

Flexor Digitorum Brevis Insertion

Answer 16

Both sides of middle phalanx of lateral four digits

Question 17

Flexor Digitorum Brevis action

Answer 17

Flexes lateral 4 digits (PIP)

Question 18

Flexor Digitorum Brevis Innervation

Answer 18

Medial Plantar n. (S1-S2)

Question 19

Abductor Digiti minimi origin

Answer 19

• Medial and lateral processes or tuber calcanei
• Plantar aponeurosis
• Intermuscular septum

Question 20

Abductor Digiti minimi insertion

Answer 20

Lateral side of base of proximal phalanx of 5th digit (little toe)

Question 21

Abductor Digiti minimi action

Answer 21

Abducts and flexes 5th digit

Question 22

Abductor Digiti minimi innervation

Answer 22

Lateral plantar n. (S2-S3)

Question 23

2nd layer of muscles on sole of the foot

Answer 23

• quadratus plantae

- lumbricals

Question 24

Quadratus Plantae origin

Answer 24

-Medal surface and lateral margin of plantar surface of calcaneus

Question 25

Quadratus Plantae insertion

Answer 25

Posterolateral margin of tendon of Flex. Dig. Longus

Question 26

Quadratus Plantae action

Answer 26

Assists Flex. Dig. Longus in flexing lateral 4 digits

Question 27

Quadratus Plantae innervation

Answer 27

Lateral Plantar n. (S2-S3)

Question 28

Lumbricals origin

Answer 28

Tendons of Flex. Dig. Longus

Question 29

Lumbricals insertion

Answer 29

- Medial sides of bases of proximal phalanges of lateral 4 digits - Extensor expansions of tendons of Ext. Dig. Longus

Question 30

Lumbricals action

Answer 30

- Flex proximal phalanges | - Extend middle and distal phalanges of lateral 4 digits

Question 31

Lumbricals Innervation

Answer 31

Medial Lumbrical- medial plantar n. (S2-S3) | Lateral 3 lumbricals- lateral plantar n. (S2, S3)

Question 32

3rd layer of muscles on the sole of the foot

Answer 32

- Flexor Hallucis Brevis - Adductor Hallucis - Flexor Digiti minimi Brevis

Question 33

Flexor Hallucis Brevis origin

Answer 33

Plantar surfaces of cuboid and lateral cuneiform bones

Question 34

Flexor Hallucis Brevis insertion

Answer 34

Both sides of base of proximal phalanx of hallux

Question 35

Flexor Hallucis Brevis action

Answer 35

Flexes proximal phalanx of hallux

Question 36

Flexor Hallucis Brevis Innervation

Answer 36

Medial plantar n. (S1-S2)

Question 37

Adductor Hallucis origin

Answer 37

- Oblique head (bases of metatarsals 2-4) | - Transverse head (plantar ligaments of MTP joints)

Question 38

Adductor Hallucis insertion

Answer 38

Tendons of both heads attach to lateral side of base of proximal phalanx of hallux

Question 39

Adductor Hallucis action

Answer 39

- ADducts Hallux | - assists in maintaining transverse arch

Question 40

Adductor Hallucis innervation

Answer 40

Lateral plantar n. (S2-S3)

Question 41

4th layer of muscles on the sole of the foot

Answer 41

- Plantar interossei (3 muscles) | - Dorsal interossei (4 muscles)

Question 42

Plantar interossei origin

Answer 42

Bases and medial sides of metatarsal bones 3-5

Question 43

Plantar interossei insertion

Answer 43

Medial side of bases of proximal phalanges of digits 3-5

Question 44

Plantar interossei action

Answer 44

ADducts digits (3-5) and flexes MTP joints

Question 45

Plantar interossei innervation

Answer 45

Lateral plantar n. (S2, S3)

Question 46

Dorsal interossei origin

Answer 46

Adjacent sides of metatarsal bones 1-5

Question 47

Dorsal interossei insertioin

Answer 47

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

Question 48

Dorsal interossei action

Answer 48

Abducts digits (2-4) and MTP joints

Question 49

Dorsal interossei innervation

Answer 49

Lateral plantar n. (S2-S3)