Leg I & II: Origin, Insertion, Action Flashcards
Gastrocnemius
O - Lateral condyle of femur
I - Calcaneus via calcaneal tendon
A - Plantar Flexion, flexion at knee
Soleus
O -Posterior/superior aspect of tibia and fibula
I - Calcaneus via calcaneal tendon
A - Plantar flexion at ankle
Plantaris
O - Lateral condyle of femur
I - Calcaneus via calcaneal tendon
A - Weak plantar flexion at ankle, proprioception
Popliteus
O -Lateral condyle of femur
I - Posterior tibia above soleus
A - Weak knee flexion, unlock knee
Tibialis Posterior
O - Interosseous membrane, posterior tibia and fibula
I - Navicular, cuneiforms (MIL), cuboid, base of 2-4 (metatarsals)
A - Flexion of every joint proximal-distal attachment points, plantar flexion at ankle, arch support
Flexor Hallicus Longus
O - Posterior fibula, interosseous membrane
I - Distal phalanges
A - Flexion of every joint proximal-distal attachment points, plantar flexion at ankle, arch support
Flexor Digitorum Longus
O - Posterior tibia, interosseous membrane
I - Distal Phalanges
A - Flexion of every joint proximal-distal attachment points, plantar flexion at ankle, arch support
Tibialis Anterior
O - Lateral surface of tibia, interosseous membrane
I - Medial cuneiform; 1st metatarsal base
A - Dorsiflexion at ankle, inversion of foot, arch support
Extensor Hallicus Longus
O - Anterior fibula, interosseous membrane
I - Distal phalanx of great toe
A - Dorsiflexion at ankle, extension of great toe
Extensor Digitorum Longus
O - Anterior fibula, interosseous membrane
I - Middle & Distal phalanges
A - Dorsiflexion at ankle, extension of lateral 4 digits
Fibularis Longus
O - Lateral condyle of fibula
I - Medial cuneiform; 1st metatarsal base
A - Eversion of foot, weak plantar flexion, arch support
Fibularis Brevis
O - Lateral aspect of fibula
I - Base of 5th metatarsal
A - Eversion of foot, weak plantar flexion, arch support