Intrinsic Muscles Of The Foot

Front 1

Why are they called intrinsic muscles?

Back 1

because they originate and insert within the foot

Front 2

How many layers are in the plantar group of intrinsic foot muscles?

Back 2

FOUR
first layer: most superficial
second layer
third layer
fourth layer: deepest

Front 3

plantar aponeurosis (fascia)

Back 3

formed by the deep fascia, this extends from calcaneus bone to phalanges of toes and supports longitudinal arch of the foot, encloses flexor tendons

Front 4

Name the two groups of intrinsic foot muscles

Back 4

Dorsal

Plantar

Front 5

DORSAL

extensor digitorum brevis origin

Back 5

calcaneus and inferior extensor retinaculum

Front 6

DORSAL

extensor digitorum brevis insertion

Back 6

tendons of extensor digitorum longus on toes 2-4 and proximal phalanx of great toe

Front 7

DORSAL

extensor digitorum brevis action

Back 7

extensor hallucis brevis extends great toe at metatarsophalangeal joint extensor digitorum brevis extends toes 2-4 at interphalangeal joints

Front 8

PLANTAR - First layer

abductor hallucis origin

Back 8

calcaneus, plantar aponeurosis, and flexor retinaculum

Front 9

PLANTAR - First layer

abductor hallucis insertion

Back 9

medial side of promimal phalanx of great toe with tendon of flexor hallucis brevis

Front 10

PLANTAR - First layer

abductor hallucis action

Back 10

abducts and flexes great toe at metatarsophalangeal joint

Front 11

PLANTAR - First layer

flexor digitorum brevis origin

Back 11

calcaneus and plantar aponeurosis

Front 12

PLANTAR - First layer

flexor digitorum brevis insertion

Back 12

sides of middle phalanx of toes 2-5

Front 13

PLANTAR - First layer

flexor digitorum brevis action

Back 13

flexes toes 2-5 at proximal interphalangeal and metasophalangeal joints

Front 14

PLANTAR - First layer

abductor digiti minimi origin

Back 14

calcaneus and plantar aponeurosis

Front 15

PLANTAR - First layer

abductor digiti minimi insertion

Back 15

lateral side of proximal phalanx of little toe with tendon of flexor digiti minimi brevis

Front 16

PLANTAR - First layer

abductor digiti minimi action

Back 16

abducts and flexes little toe at metasophalangeal joint

Front 17

PLANTAR - Second layer

quadratus plantae origin

Back 17

calcaneus

Front 18

PLANTAR - Second layer

quadratus plantae insertion

Back 18

tendon of flexor digitorum longus

Front 19

PLANTAR - Second layer

quadratus plantae action

Back 19

assists flexor digitorum longus to flex toes 2-5 at interphalangeal and metatarsophalangeal joints

Front 20

PLANTAR - Second layer

lumbricals origin

Back 20

tendons of flexor digitorum longus

Front 21

PLANTAR - Second layer

lumbricals insertion

Back 21

tendons of extensor digitorum longus on proximal phalanges of toes 2-5

Front 22

PLANTAR - Second layer

lumbricals action

Back 22

extend toes 2-5 at interphalangeal joints and flexes toes 2-5 at metatarsophalangeal joints

Front 23

PLANTAR - Third layer

flexor hallucis brevis origin

Back 23

cuboid and third (lateral) cuneiform

Front 24

PLANTAR - Third layer

flexor hallucis brevis insertion

Back 24

medial and lateral sides of proximal phalanx of great toe via tendon containing sesamoid bone

Front 25

PLANTAR - Third layer

flexor hallucis brevis action

Back 25

flexes great toe at metatarsophalangeal joint

Front 26

PLANTAR - Third layer

adductor hallucis origin

Back 26

metatarsals 2-4, ligaments of 3-5 metatarsophalangeal joints, and tendon of peroneus longus

Front 27

PLANTAR - Third layer

adductor hallucis insertion

Back 27

lateral side of proximal phalanx of great toe

Front 28

PLANTAR - Third layer

adductor hallucis action

Back 28

adducts and flexes great toe at metatarsophalangeal joint

Front 29

PLANTAR - Third layer

flexor digiti minimi brevis origin

Back 29

metatarsal 5 and tendon of peroneus longus

Front 30

PLANTAR - Third layer

flexor digiti minimi brevis insertion

Back 30

lateral side of proximal phalanx of little toe

Front 31

PLANTAR - Third layer

flexor digiti minimi brevis action

Back 31

flexes little toe at metatarsophalangeal joint

Front 32

PLANTAR - Fourth layer

dorsal interossei origin

Back 32

adjacent side of metatarsals

Front 33

PLANTAR - Fourth layer

dorsal interossei insertion

Back 33

proximal phalanges: both sides of toe 2 and lateral side of toes 3 & 4

Front 34

PLANTAR - Fourth layer

dorsal interossei action

Back 34

abduct and flex toes 204 at metatarsophalangeal joints and extend toes at interphalangeal joints

Front 35

PLANTAR - Fourth layer

plantar interossei origin

Back 35

metatarsals 3-5

Front 36

PLANTAR - Fourth layer

plantar interossei insertion

Back 36

medial side of proximal phalanges of toes 3-5

Front 37

PLANTAR - Fourth layer

plantar interossei action

Back 37

adduct and flex proximal metatarsophalangeal joints and extend toes at interphalangeal joints