Distal leg muscle actions and innervations Flashcards
What are the muscles of the anterior compartment ?
Tibialis anterior, Flexor digitorum longus, flexor hallucis longus, peroneus tertius.
What are the muscle in the lateral compartment?
Peroneus brevis and longus
What are the muscle of the posterior compartment?
Popliteus, Plantaris, Gastrocnemius, Soleus, Tibialis posterior, flexor digitorium longus, and flexor hallucis longus
Action of Tibialis anterior
Dorsiflex and invert foot
Action of Extensor digitorum longus
Extend digits 2-5, dorsiflex, eversion
Action of Extensor hallucis longus
Extend digit 1, dorsiflex, inversion
Action of peroneus tertius
eversion
Anterior compartment muscles are innervated by…
Deep peroneal nerve
Action of peroneus longus
Eversion, plantar flexion
Action of peroneus brevis
Eversion, plantar flexion
Innervation of lateral compartment muscles?
Superficial peroneal n
Action of Gastrocnemius
Powerful plantar flexion, minor knee flexion
Action of soleus
plantar flexion
Action of Plantaris
Plantar flexion and flex knee
Action of popliteus
Flex knee, lateral rotation of femur on the tibia, unlocking the knee.
Action of flexor digitorum longus
Flex digits 2-5, plantar flexion, inversion
Action of flexor hallucis longus
Flex digit 1, plantar flexion, inversion
Action of tibialis posterior
inversion, plantar flexion
Innervation of all posterior compartment muscles?
Tibial n.
What are the muscles of the foot?
Dorsal: extensor digitorium brevis
Plantar:
Flexor digitorum brevis,
Flexor hallucis brevis, Adductor hallucis, Abductor hallucis, Abductor digiti minimi, Quadratus plantaris.
Action of extensor digitorum brevis?
Extend digits 1-4
Innervation of extensor digitorum brevis?
deep peroneal
Action of adductor hallucis
Adduction of digit 1
Action of abductor hallucis
Abduction of digit 1
