Leg & Foot OIAI

gastrocnemius origin - lateral head

Superior to lateral condyle of femur

gastrocnemius origin - medial head

Superior to medial condyle of femur

gastrocnemius insertion

Posterior surface of calcaneus via calcaneal tendon

gastrocnemius innervation

Tibial

gastrocnemius action

Flexes leg, plantarflexes foot

soleus origin

Posterior surface of fibula, soleal line of tibia

soleus insertion

Posterior surface of calcaneus via calcaneal tendon

soleus innervation

Tibial

soleus action

Plantarflexes foot

plantaris origin

Lateral supracondylar line of femur

plantaris insertion

Posterior surface of calcaneus via calcaneal tendon

plantaris innervation

Tibial

plantaris action

Flexes leg, plantarflexes foot

popliteus origin

Lateral epicondyle of femur, lateral meniscus

popliteus insertion

Superior to soleal line of tibia

popliteus innervation

Tibial

popliteus action

Flexes leg, medially rotates leg

flexor hallucis longus origin

Posterior surface of fibula

flexor hallucis longus insertion

Distal phalanx of digit 1

flexor hallucis longus innervation

Tibial

flexor hallucis longus action

Plantarflexes foot, flexes digit 1 at IP and MTP joints

flexor digitorum longus origin

Posterior surface of tibia

flexor digitorum longus insertion

Distal phalanges of digits 2-5

flexor digitorum longus innervation

Tibial

flexor digitorum longus action

Plantarflexes foot, flexes digits 2-5 at MTP and IP joints

tibialis posterior origin

Posterior surface of fibula, posterior surface of tibia

tibialis posterior insertion

Medial & intermediate & lateral cuneiform, cuboid, navicular, bases of metatarsals 2-4

tibialis posterior innervation

Tibial

tibialis posterior action

Plantarflexes and inverts foot

fibularis longus origin

Lateral surface of fibula

fibularis longus insertion

Base of 1st metatarsal, medial cuneiform

fibularis longus innervation

Superficial Fibular

fibularis longus action

Plantarflexes and everts foot

fibularis brevis origin

Lateral surface of fibula

fibularis brevis insertion

Tuberosity of 5th metatarsal

fibularis brevis innervation

Superficial Fibular

fibularis brevis action

Plantarflexes and everts foot

fibularis tertius origin

Anterior surface of fibula

fibularis tertius insertion

Base of 5th metatarsal

fibularis tertius innervation

Deep Fibular

fibularis tertius action

Dorsiflexes and everts foot

tibialis anterior origin

Lateral condyle and lateral surface of tibia

tibialis anterior insertion

Medial cuneiform, base of 1st metatarsal

tibialis anterior innervation

Deep Fibular

tibialis anterior action

Dorsiflexes and inverts foot

extensor hallucis longus origin

Anterior surface of fibula

extensor hallucis longus insertion

Distal phalanx of digit 1

extensor hallucis longus innervation

Deep Fibular

extensor hallucis longus action

Extends digit 1 at MTP and IP joints, dorsiflexes foot

extensor digitorum longus origin

Lateral condyle of tibia, medial surface of fibula

extensor digitorum longus insertion

Extensor expansions to middle and distal phalanges of digits 2-5

extensor digitorum longus innervation

Deep Fibular

extensor digitorum longus action

Extends digits 2-5 at MTP and IP joints, dorsiflexes foot

extensor digitorum brevis origin

Calcaneus

extensor digitorum brevis insertion

Tendons of extensor digitorum longus muscle of digits 2-4

extensor digitorum brevis innervation

Deep Fibular

extensor digitorum brevis action

Extends digits 2-4 at MTP and IP joints

extensor hallucis brevis origin

Calcaneus

extensor hallucis brevis insertion

Proximal phalanx of digit 1

extensor hallucis brevis innervation

Deep Fibular

extensor hallucis brevis action

Extends digit 1 at MTP joint

abductor hallucis origin

Calcaneus

abductor hallucis insertion

Proximal phalanx of digit 1

abductor hallucis innervation

Medial plantar

abductor hallucis action

Abducts and flexes digit 1 at MTP joint

flexor digitorum brevis origin

Calcaneus

flexor digitorum brevis insertion

Middle phalanges of digits 2-5

flexor digitorum brevis innervation

Medial plantar

flexor digitorum brevis action

Flexes digits 2-5 at MTP and proximal IP joints

abductor digiti minimi origin

Calcaneus

abductor digiti minimi insertion

Proximal phalanx of digit 5

abductor digiti minimi innervation

Lateral plantar

abductor digiti minimi action

Abducts and flexes digit 5 at MTP joint

quadratus plantae origin

Calcaneus

quadratus plantae insertion

Tendon of flexor digitorum longus muscle

quadratus plantae innervation

Lateral plantar

quadratus plantae action

Assists flexor digitorum longus muscle in flexing digits 2-5 at MTP and IP joints

lumbricals origin

Tendons of flexor digitorum longus muscle

lumbricals insertion

Extensor expansions to middle and distal phalanges of digits 2-5

lumbricals innervation

2nd - medial plantar

3rd-5th - lateral plantar

lumbricals action

Flexes digits 2-5 at MTP joints, extends digits 2-5 at IP joints

flexor hallucis brevis origin

Cuboid, lateral cuneiform

flexor hallucis brevis insertion

Proximal phalanx of digit 1

flexor hallucis brevis innervation

Medial plantar

flexor hallucis brevis action

Flexes MTP joint of digit 1

adductor hallucis origin

Oblique head: bases of metatarsals 2-4

Transverse head: plantar ligaments of MTP joints

adductor hallucis insertion

Proximal phalanx of digit 1

adductor hallucis innervation

(deep branch of) lateral plantar

adductor hallucis action

Adduct digit 1 at MTP joint

flexor digiti minimi brevis origin

Base of 5th metatarsal

flexor digiti minimi brevis insertion

Proximal phalanx of digit 5

flexor digiti minimi brevis innervation

(superficial branch of) lateral plantar

flexor digiti minimi brevis action

Flexes digit 5 at MTP joint

plantar interossei origin

Medial surfaces of metatarsals 3-5

plantar interossei insertion

Proximal phalanges of digits 3-5, extensor expansions to middle and distal phalanges of digits 3-5

plantar interossei innervation

Lateral plantar

plantar interossei action

Flexes and adducts digits 3-5 at MTP joints, extends digits 3-5 at IP joints

dorsal interossei origin

Adjacent sides of metatarsals

dorsal interossei insertion

Proximal phalanges of digits 2-4, extensor expansions to middle and distal phalanges of digits 2-4

dorsal interossei innervation

Lateral plantar