Muscles- leg and dorsum of foot Flashcards
Tibialis anterior
attachment
lateral condyle and lateral surface of tibia, medial cuneiform, base of 1st metatarsal
Tibialis anterior
action
dorsiflexes and inverts foot
Tibialis anterior
innervation
Deep fibular nerve (L4-L5)
Extensor digitorum longus
attachment
lateral condyle of tibia, medial surface of fibula, extensor expansions to middle and distal phalanges of digits 2-5
Extensor digitorum longus
action
extends digits 2-5 at IP and MTP joints and dorsiflexes foot
Extensor digitorum longus
innervation
Deep fibular nerve (L4-L5)
Extensor hallicus longus
attachment
anterior surface of fibula, distal phalanx of digit 1
Extensor hallicus longus
action
extends digit 1 at IP and MTP joints and dorsiflexes foot
Extensor hallicus longus
innervation
Deep fibular nerve (L4-L5)
Fibularis tertius
attachment
anterior surface of fibula, base of 5th metacarpal
Fibularis tertius
action
dorsiflexes and everts foot
Fibularis tertius
innervation
Deep fibular nerve (L4-L5)
Fibularis longus
attachment
lateral surface of fibula, base of 1st metatarsal, medial cuneiform
Fibularis longus
action
everts and plantar flexes foot
Fibularis longus
innervation
Superficial fibular nerve (L5-S2)
Fibularis brevis
attachment
lateral surface of fibula, tuberosity of 5th metatarsal
Fibularis brevis
action
everts and plantar flexes foot
Fibularis brevis
innervation
Superficial fibular nerve (L5-S2)
Gastrocnemius
attachment
Lateral head: lateral condyle of femur
Medial head: medial condyle of femur
Both: Posterior surface of calcaneus via calcaneal tendon
Gastrocnemius
action
plantar flexes foot and flexes leg
Gastrocnemius
innervation
Tibial nerve (S1-S2)
Soleus
attachment
posterior surface of fibula, soleal line and medial surface of tibia, posterior surface of calcaneus via calcaneal tendon
Soleus
action
plantar flexes foot
Soleus
innervation
Tibial nerve (S1-S2)
Plantaris
attachment
lateral supracondylar line of femur, posterior surface of calcaneus via calcaneal tendon
Plantaris
action
plantar flexes foot
Plantaris
innervation
Tibial nerve (S1-S2)
Popliteus
attachment
lateral condyle of femur, lateral meniscus, superior to soleal line of tibia
Popliteus
action
flexes and medially rotates leg
Popliteus
innervation
Tibial nerve (L4-S1)
Flexor hallicus longus
attachment
posterior surface of fibula, distal phalanx of digit 1
Flexor hallicus longus
action
flexes digit 1 at IP and MTP joints, plantar flexes foot
Flexor hallicus longus
innervation
Tibial nerve (S2-S3)
Flexor digitorum longus
attachment
posterior surface of tibia, distal phalanges of digits 2-5
Flexor digitorum longus
action
flexes digits 2-5 at IP and MTP joints, plantar flexes foot
Flexor digitorum longus
innervation
Tibial nerve (S2-S3)
Tibialis posterior
attachment
posterior surface of tibia and fibula, navicular, cuboid, calcaneus, and cuneiforms, bases of metatarsals 2-4
Tibialis posterior
action
plantar flexes and inverts foot
Tibialis posterior
innervation
Tibial nerve (L4-L5)
Extensor digitorum brevis
attachment
calcaneus, tendons of extensor digitorum longus muscle of digits 2-4
Extensor digitorum brevis
action
extends digits 2-4 at IP and MTP joints
Extensor digitorum brevis
innervation
Deep fibular nerve (L5-S1)
Extensor hallicus brevis
attachment
calcaneus to proximal phalanx of digit 1
Extensor hallicus brevis
action
extends digit one at MTP joint
Extensor hallicus brevis
innervation
Deep fibular nerve (L5-S1)
Dorsal interossei
attachment
adjacent sides of metatarsals, proximal phalanges of digits 2-4, extensor expansions of digits 2-4 (these are muscles of the SOLE of the foot)
Dorsal interossei
action
abducts digits 3&4; medially and laterally abduct digit 2; flex MTP joints of digits 2-4; extend IP joints of digits 2-4
Dorsal interossei
innervation
Tibial nerve (S2-S3)