Muscles of the Lower Extremity: Intinsic Muscles of the Foot

Question 1

Extensor Digitorum Brevis Proximal Attachment

Answer 1

Dorsolateral surface of the calcaneus

Question 2

Extensor Digitorum Brevis Distal Attachment

Answer 2

Joins lateral sides of EDL tendons of toes 2-4

Question 3

Extensor Digitorum Brevis Innervation

Answer 3

Deep fibular n. [L5,S1]

Question 4

Extensor Digitorum Brevis Action

Answer 4

Extends MTP, PIP, & DIP joints of toes 2-4

Question 5

Extensor Hallucis Brevis Proximal Attachment

Answer 5

Dorsal surface of the calcaneus

Question 6

Extensor Hallucis Brevis Distal Attachment

Answer 6

Dorsal surface of the proximal phalanx of the great toe

Question 7

Extensor Hallucis Brevis Innervation

Answer 7

Deep fibular n. [L5,S1]

Question 8

Extensor Hallucis Brevis Action

Answer 8

Extends MTP joint of great toe

Question 9

First Layer Muscles

Answer 9

Abductor Hallucis
Flexor Digitorum Brevis
Abductor Digiti Minimi

Question 10

Abductor Hallucis Proximal Attachment

Answer 10

Medial tubercle of the calcaneus

Question 11

Abductor Hallucis Distal Attachment

Answer 11

Medial side of the proximal phalanx of the great toe

Question 12

Abductor Hallucis Innervation

Answer 12

Medial plantar n. [S2,S3]

Question 13

Abductor Hallucis Action

Answer 13

Abducts MTP joint of great toe

Flexes MTP joint of great toe

Question 14

Flexor Digitorum Brevis Proximal Attachment

Answer 14

Medial tubercle of the calcaneus

Question 15

Flexor Digitorum Brevis Distal Attachment

Answer 15

Medial sides of the middle phalanx of digits II-V

Question 16

Flexor Digitorum Brevis Innervation

Answer 16

Medial plantar n. [S2,S3]

Question 17

Flexor Digitorum Brevis Action

Answer 17

Flexes MTP & PIP joints of lateral 4 toes

Question 18

Abductor Digiti Minimi Proximal Attachment

Answer 18

Tuberosity of the calcaneus and plantar aponeurosis

Question 19

Abductor Digiti Minimi Distal Attachment

Answer 19

Lateral side of proximal phalanx of digit V

Question 20

Abductor Digiti Minimi Innervation

Answer 20

Lateral plantar n. [S2,S3]

Question 21

Abductor Digiti Minimi Action

Answer 21

Abducts MTP joint of little toe

Flexes MTP joint of little toe

Question 22

Second Layer Muscles

Answer 22

Quadratus Plantae

Lumbricals

Question 23

Quadratus Plantae Proximal Attachment

Answer 23

Plantar aspect of the calcaneus

Question 24

Quadratus Plantae Distal Attachment

Answer 24

Lateral margin of FDL tendons

Question 25

Quadratus Plantae Innervation

Answer 25

Lateral plantar n. {S2,S3]

Question 26

Quadratus Plantae Action

Answer 26

Assists FDL in flexing lateral 4 toes

Question 27

Lumbricals Proximal Attachment

Answer 27

Tendons of the flexor digitorum longus muscle

Question 28

Lumbricals Distal Attachment

Answer 28

Medial side of the proximal phalanx of digits II-V via the extensor hoods

Question 29

Lumbricals Innervation

Answer 29

1st: Medial plantar n. [S2,S3] | 2nd-4th: Lateral plantar n. [S2,S3]

Question 30

Lumbricals Action

Answer 30

Flexes the MTP joints of the lateral 4 toes | Extends the PIP & DIP joints of lateral 4 toes

Question 31

Third Layer Muscles

Answer 31

Flexor Hallucis Brevis Adductor Hallucis Flexor Digiti Minimi

Question 32

Flexor Hallucis Brevis Proximal Attachment

Answer 32

Plantar surface of cuboid and lateral cuneiform

Question 33

Flexor Hallucis Brevis Distal Attachment

Answer 33

Both sides of the proximal phalanx of the great toe

Question 34

Flexor Hallucis Brevis Innervation

Answer 34

Medial plantar n. [S2,S3]

Question 35

Flexor Hallucis Brevis Action

Answer 35

Flexes MTP joint of great toe

Question 36

Adductor Hallucis Proximal Attachment

Answer 36

Oblique head: bases of metatarsals II-IV | Transverse head: from ligaments near the heads of metatarsals III-V

Question 37

Adductor Hallucis Distal Attachment

Answer 37

Lateral side of the proximal phalanx of the great toe

Question 38

Adductor Hallucis Innervation

Answer 38

Lateral plantar n. [S2,S3]

Question 39

Adductor Hallucis Action

Answer 39

Adducts MTP joint of great toe | Flexes MTP joint of great toe

Question 40

Flexor Digiti Minimi Proximal Attachment

Answer 40

Base of metatarsal V

Question 41

Flexor Digiti Minimi Distal Attachment

Answer 41

Lateral side of the proximal phalanx of the little toe

Question 42

Flexor Digiti Minimi Innervation

Answer 42

Lateral plantar n. [S2,S3]

Question 43

Flexor Digiti Minimi Action

Answer 43

Flexes MTP joint of little toe

Question 44

Fourth Layer Muscles

Answer 44

Dorsal Interossei | Plantar Interossei

Question 45

Dorsal Interossei Proximal Attachment

Answer 45

Adjacent sides of 2 metatarsals

Question 46

Dorsal Interossei Distal Attachment

Answer 46

1st: Medial side of proximal phalanx of digit II | 2nd, 3rd, 4th: Lateral sides of proximal phalanx of digits II-IV

Question 47

Dorsal Interossei Innervation

Answer 47

Lateral plantar n. [S2,S3]

Question 48

Dorsal Interossei Action

Answer 48

Abducts MTP joints of toes 2-4 Flexes MTP joints of toes 2-4 Extends PIP & DIP joints of toes 2-4

Question 49

Plantar Interossei Proximal Attachment

Answer 49

Medial sides of MT III-V

Question 50

Plantar Interossei Distal Attachment

Answer 50

Medial sides of proximal phalanx of digits III-V

Question 51

Plantar Interossei Innervation

Answer 51

Lateral plantar n. [S2,S3]

Question 52

Plantar Interossei Action

Answer 52

Adducts MTP joints of toes 3-5 Flexes MTP joints of toes 3-5 Extends PIP & DIP joints of toes 3-5