Muscles O/I/A - Lower Extremity Flashcards
Vastus Lateralis
AND
Vastus Medialis
O: Linea Aspera
I: Tibial Tuberosity via patella tendon
A: Knee Extension
Vastus Intermedius
O: Anterior Femur
I: Tibial Tuberosity via patella tendon
A: Knee Extension
Gastrocnemius
O: Medial and Lateral Condyles of Femur
I: Posterior Calcaneus
A: Knee Flexion, Ankle Plantar Flexion
Soleus
O: Posterior Tibia and Fibula
I: Posterior Calcaneus
A: Plantar Flexion of ankle
Tibialis Posterior
O: Interosseous membrane, adjacent Tibia and Fibula
I: Navicular and most tarsals and metatarsals
A: Ankle Inversion, assist Plantar Flexion
Peroneus Brevis
O: Lateral Distal Fibula
I: Base of 5th Metatarsal
A: Ankle Eversion, assist Plantar Flexion
Peroneus Longus
O: Lateral Proximal Fibula and interosseous membrane
I: Plantar surface of 1st Cuneiform and 1st Metatarsal
A: Anlke eversion, assist Plantar Flexion
Tibialis Anterior
O: Lateral Tibia, Interosseous membrane
I: 1st Cuneiform and 1st Metatarsal
A: Ankle Inversion and Dorsiflexion
Lumbricales (action only)
A: Flexes MP joints and extends PIP and DIP joints of toes 2-5
Flexor Hallucis Brevis (Action only)
A: Flexes MP joint of great toe
Extensor Digitorum Brevis (I & A only)
I: Middle phalanx of toes 2-4
A: Extends MP, PIP, nd DIP joints of toes 2-4
Extensor Digitorum Longus (I & A only)
I: Distal phalanx of 4 lesser toes
A: Extends 4 lesser toes, assist Dorsiflexion
Flexor Digitorum Longus (I & A only)
I: Distal phalanx of four lesser toes
A: Flexion of four lesser toes; assist inversion and plantar flexion
Flexor Digitorum Brevis (I & A only)
I: Middle phalanx of toes 2-5
A: Flexes MP and PIP joits of toes 2-5