the leg muscles Flashcards
anterior compartment of the leg
Tibialis anterior
Extensor digitorum longus
Extensor hallucis longus:
posterior compartment of the leg (super)
Gastrocnemius
Soleus
Plantaris
deep posterior compartment of the leg
Popliteus
Tibialis posterior*:
Flexor hallucis longus
Flexor digitorum longus
lateral compartment of the leg
Fibularis Longus
Fibularis Brevis
tibialis anterior
O= Lateral surface of tibia, interosseous membrane
I= Medial cuneiform bone, base of metatarsal bone 1
A= foot dorsiflexion, foot inversion
I= deep fibula nerve
Extensor digitorum
longus
O=interosseus membrane
I= Distal and middle phalanges of digits 2-5
A=Toe extension, Foot dorsiflexion, Foot eversion
I= Deep fibular nerve (L5, S1)
Extensor hallucis
longus
O= Middle third of medial surface of fibula, interosseous membrane
I= Base of distal phalanx of great toe
A= Great toe extension, foot dorsiflexion
I= Deep fibular nerve
Gastrocnemius
O=2 heads : lateral condyle of the femur, medial femoral condyle
i= Posterior surface of the calcaneus via the calcaneal tendon
A= Foot plantar flexion, Leg flexion
I= Tibial nerve
Soleus
O= head of fibula, posterior border of fibus
I=Posterior surface of calcaneus
A=Talocrural joint: Foot plantar flexion
I= Tibial nerve (S1, S2)
Plantaris
O= Lateral supracondylar line of femur
I= Lateral supracondylar line of femur,
A= foot plantar flexion, knee flexion
I= Tibial nerve (S1, S2)
Popliteus
O=Lateral condyle of femur
I= Posterior surface of proximal tibia
A= Knee joint stabilization “unlocking”
I= Tibial nerve (L4-S1)
Tibialis posterior
O= Posterior surface of tibia
I= Tuberosity of navicular bone, bases of metatarsal bones 2-4
A= Foot plantarflexion, Foot inversion
Supports medial longitudinal arch of foot
I=Tibial nerve (L4, L5)
Flexor hallucis longus
O=Posterior surface of fibula
I=Base of distal phalanx of great toe
A=Toe flexion; Foot plantar flexion, Foot inversion
I=Tibial nerve (S2, S3)
Flexor digitorum longus
O= Posterior surface of tibia (inferior to soleal line)
I=Bases of distal phalanges of digits 2-5
A=toe flexion, foot plantar flexion, foot inversion
I= Tibial nerve (L5, S1, S2)
Fibularis Longus
O=Head of fibula,
I=metatarsal bone 1
A=Foot plantar flexion, Foot eversion;
Supports longitudinal and transverse arches of foot
I=Superficial fibular nerve (L5, S1)
Fibularis brevis
O=anterior inermuscular septum
I=Tuberosity of the 5th metatarsal bone
A=Foot plantar flexion Foot eversion
I=Superficial fibular nerve (L5, S1)
