Unit 3 Muscles of the Foot

Extensor digitourm brevis origin

Calcaneus

Extensor digitourm brevis Insertion

Tendons of extensor digitorum longus

Extensor digitourm brevis innervation

Deep fibular nerve

Extensor digitourm brevis function

Extension of toes 2-4

Extensor hallucis brevis origin

Calcaneus

Extensor hallucis brevis Insertion

Base of proximal phalanx of hallux

Extensor hallucis brevis Innervation

Deep fibular nerve

Extensor hallucis brevis Function

Extension of hallux at metatarsophalangeal joint

Abductor hallucis origin

Calcaneal tuberosity

Abductor hallucis Insertion

Medial side of base of proximal phalanx of hallux

Abductor hallucis Innervation

Medial plantar nerve

Abductor hallucis Function

Abduction of hallux at metatarsophalangeal joint

Flexion of hallux at metatarsophalangeal joint

Flexor digitorum brevis origin

Calcaneal tuberosity

Plantar aponeurosis

Flexor digitorum brevis insertion

Plantar surfaces of middle phalanges of toes 2-5

Flexor digitorum brevis Innervation

medial plantar Nerve

Flexor digitorum brevis function

Fixing of toes 2-5 at proximal interphalangeal joint

Adductor digiti minimi origin

Calcaneal tuberosity

Connective tissue between calcaneus and metatarsal V

Adductor digiti minimi Insertion

Lateral side of base of proximal phalanx of digit 5

Adductor digiti minimi Innervation

Lateral plantar nerve

Adductor digiti minimi Function

Abduction of little toe at metatarsophalangeal joint

Quadratus plantae origin

Medial surface of calcaneus

Calcaneal tuberosity

Quadratus plantae Insertion

Tendon of flexor digitorum longus in sole of foot

Quadratus plantae Innervation

Lateral plantar nerve

Quadratus plantae Function

Assists flexor digitorum longus tendon in flexion of toes 2-5

Lumbricals origin

1st digit: medial Side of tendon of flexor digitorum longus associated with toe 2

Digits 2-4: adjacent surfaces of adjacent tendons of flexor digitorum longus

Lumbricals insertion

Medial margins of extensor hoods of toes 2-5

Lumbricals Innervation

Digit 1: medial plantar nerve

Digits 2-4: lateral plantar nerve

Lumbricals function

Flexion of metatarsophalangeal joint and extension of interphalangeal joints

Flexor hallucis brevis origin

Plantar surface of cuboid and lateral cuneiform

Tendon of tibialis posterior

Flexor hallucis brevis Insertion

Medial and lateral sides of base of proximal phalanx of hallux

Flexor hallucis brevis Innervation

Medial plantar nerve

Flexor hallucis brevis Function

Flexion of hallux at metatarsophalangeal joint

Adductor hallucis origin

Ligaments of metatarsophalangeal joints of toes 3-5

Bases of metatarsals 2-4

Sheath covering Fibularis longus

Adductor hallucis Insertion

Lateral side of base proximal phalanx of hallux

Adductor hallucis Innervation

Lateral plantar ne

Adductor hallucis Function

Adduction of hallux at metatarsophalangeal joint

Flexor digiti minimi brevis origin

Base of metatarsal IV

Tendon sheath of Fibularis longus

Flexor digiti minimi brevis Insertion

Lateral side of base of proximal phalanx of little toe

Flexor digiti minimi brevis innervation

Lateral plantar nerve

Flexor digiti minimi brevis Function

Flexion of little toe at metatarsophalangeal joint

Plantar interossei origin

Medial sides of metatarsals 3-5

Plantar interossei Insertion

Extensor hoods and bases of proximal phalanges toes 3-5

Plantar interossei Innervation

Lateral plantar nerve

Plantar interossei Function

Adduction of toes 3-5 at metatarsophalangeal joint

Resist extension of metatarsophalangeal joint

Flexion of interphalangeal joints

Dorsal interossei origin

Sides of adjacent metatarsals

Dorsal interossei Insertion

Extensor hoods

Bases of proximal phalanges of toes 2-4

Dorsal interossei Innervation

Digits 1-2: deep fibular nerve and lateral nerve

Digits 3-4: lateral plantar nerve