DPT 745 - Muscle Chart Week 2

Leg and Foot & Thorax Muscle Charts

tibialis anterior proximal attachment

tibia and interosseous membrane

tibialis anterior distal attachment

medial cuneiform and base of metatarsal 1

tibialis anterior action

dorsiflexion and inversion

tibialis anterior innervation

deep fibular nerve (L4, L5)

extensor digitorum longus proximal attachment

fibula and lateral tibial condyle

extensor digitorum longus distal attachment

via dorsal digital expansions into toes 2-5

extensor digitorum longus action

extension of toes 2-5 and dorsiflexion

extensor digitorum longus innervation

deep fibular nerve (L5, S1)

extensor hallucis longus proximal attachment

fibula and interosseous membrane

extensor hallucis longus distal attachment

distal phalanx of great toe

extensor hallucis longus action

extension of great toe and dorsiflexion

extensor hallucis longus innervation

deep fibular nerve (L5, S1)

fibularis (peroneus) tertius proximal attachment

distal part of fibula

fibularis (peroneus) tertius distal attachment

base of metatarsal 5

fibularis (peroneus) tertius action

dorsiflexion and eversion

fibularis (peroneus) tertius innervation

deep fibular nerve (L5, S1)

fibularis (peroneus) longus proximal attachment

upper surface of fibula

fibularis (peroneus) longus distal attachment

medial cuneiform and base of metatarsal 1

fibularis (peroneus) longus action

eversion and plantarflexion

fibularis (peroneus) longus innervation

superficial fibular nerve (L5, S1, S2)

fibularis (peroneus) brevis proximal attachment

lower surface of fibula

fibularis (peroneus) brevis distal attachment

base of metatarsal 5

fibularis (peroneus) brevis action

eversion and plantarflexion

fibularis (peroneus) brevis innervation

superficial fibular nerve (L5, S1, S2)

popliteus proximal attachment

posterior surface of proximal tibia

popliteus distal attachment

lateral femoral condyle

popliteus action

unlocks extended knee joint (laterally rotates femur on fixed tibia)

popliteus innervation

tibial nerve (L4 to S1)

flexor hallucis longus proximal attachment

posterior surface of fibula and interosseous membrane

flexor hallicus longus distal attachment

distal phalanx of great toe

flexor hallucis longus action

flexes great toe

flexor hallucis longus innervation

tibial nerve (S2, S3)

flexor digitorum longus proximal attachment

tibia

flexor digitorum longus distal attachment

distal phalanges of toes 2-5

flexor digitorum longus action

flexes toes 2-5, plantarflexion

flexor digitorum longus innervation

tibial nerve (S2, S3)

tibialis posterior proximal attachment

interosseous membrane, tibia, and fibula

tibialis posterior distal attachment

navicular, all cuneiform bones, and metatarsals 2-4

tibialis posterior action

inversion and plantarflexion of foot

tibialis posterior innervation

tibial nerve (L4, L5)

plantar aponeurosis proximal attachment

calcaneus

plantar aponeurosis distal attachment

proximal phalanx of each toe via the superficial transverse metatarsal ligament

plantar aponeurosis action

holds the parts of the foot together, helps protect the plantar surface of the foot from injury, helps support the longitudinal arches of the foot

plantar aponeurosis innervation

N/A

abductor hallucis proximal attachment

calcaneus

abductor hallucis distal attachment

medial side of base of proximal phalanx 1

abductor hallucis action

abduction and flexion of hallux

abductor hallucis innervation

medial plantar nerve (tibial nerve)

flexor digitorum brevis proximal attachment

calcaneus

flexor digitorum brevis distal attachment

both sides of middle phalanges 2-5

flexor digitorum brevis action

flexes digits 2-5

flexor digitorum brevis innervation

medial plantar nerve (tibial nerve)

abductor digiti minimi proximal attachment

calcaneus

abductor digiti minimi distal attachment

lateral side of base of proximal phalanx 5

abductor digiti minimi action

abduction and flexion of 5th digit

abductor digiti minimi innervation

lateral plantar nerve (tibial nerve)

quadratus plantae proximal attachment

calcaneus

quadratus plantae distal attachment

posterolateral margin of tendon of flexor digitorum longus

quadratus plantae action

assists flexor digitorum longus in flexing digits 2-5

quadratus plantae innervation

lateral plantar nerve (tibial nerve)

lumbricals proximal attachment

tendons of flexor digitorum longus

lumbricals distal attachment

medial aspect of proximal phalanges 2-5

lumbricals action

flexes proximal phalanges 2-5 and extends middle and distal phalanges

lumbricals innervation

1st lumbrical: medial plantar nerve, lumbricals 2-4: lateral plantar nerve

flexor hallucis brevis proximal attachment

plantar aspect of cuboid and lateral cuneiform, posterior tibialis tendon

flexor hallucis brevis distal attachment

both sides of base of proximal phalanx of hallux

flexor hallucis brevis action

flexion of proximal phalanx of hallux

flexor hallucis brevis innervation

medial plantar nerve (tibial nerve)

adductor hallucis proximal attachment

oblique head: bases of metatarsals 2-4, transverse head: metatarsophalangeal joints

adductor hallucis distal attachment

base of proximal phalanx of hallux (lateral side)

adductor hallucis action

adduction of hallux

adductor hallucis innervation

deep branch of lateral plantar nerve (tibial nerve)

flexor digiti minimi brevis proximal attachment

base of metatarsal 5

flexor digiti minimi brevis distal attachment

base of proximal phalanx of digit 5

flexor digiti minimi brevis action

flexion of proximal phalanx 5

flexor digiti minimi brevis innervation

superficial branch of lateral plantar nerve (tibial nerve)

plantar interossei proximal attachment

bases and medial sides of metatarsals 3-5

plantar interossei distal attachment

medial sides of bases of proximal phalanges 3-5

plantar interossei action

adduction of digits 3-5 and flexion of MTP joints

plantar interossei innervation

lateral plantar nerve (tibial nerve)

dorsal interossei proximal attachment

adjacent sides of metatarsals 1-5

dorsal interossei distal attachment

medial side of proximal phalanx 2, lateral sides of proximal phalanges 2-4

dorsal interossei action

abduction of digits 2-4 and flexion of MTP joints

dorsal interossei innervation

lateral plantar nerve (tibial nerve)

extensor digitorum brevis proximal attachment

lateral calcaneus

extensor digitorum brevis distal attachment

dorsal surface of toes 2-4

extensor digitorum brevis action

extension of toes 2-4

extensor digitorum brevis innervation

deep fibular nerve (S1, S2)

extensor hallucis brevis proximal attachment

lateral calcaneus

extensor hallucis brevis distal attachment

dorsal surface of proximal phalanx 1

extensor hallucis brevis action

extension of great toe

extensor hallucis brevis innervation

deep fibular nerve (S1, S2)

external intercostals proximal attachment

inferior border of rib above

external intercostals distal attachment

superior border of rib below

external intercostals action

elevation of ribs (assist with inhalation)

external intercostals innervation

APR: intercostal nerves

internal intercostals (interchondral part) proximal attachment

inferior border of rib above

internal intercostals (interchondral part) distal attachment

superior border of rib below

internal intercostals (interchondral part) action

elevation of ribs (assist with inhalation)

internal intercostals (interchondral part) innervation

APR: intercostal nerves