Foot Muscles Extrinsic Flashcards
name two muscle groups of foot
extrinsic and intrinsic
What are the extrinsic muscles
those that attach proximally and attach originate the foot yet insert on foot via long tendons
What are intrinsic muscles
those that originate in the foot and are shorter
Which muscles are more powerful and are used even when wearing shoes?
Extrinsic
When do you use intrinsic muscles
when barefoot
What is polyarticular
crossing multiple joints
Name the muscles of the anterior compartment
tibialis anterior
extensor hallucis longus
extensor digitorum longus
fibularis tertius
What action do all of the extrinsic muscles do?
dorsiflexion
Name the action of the extrinsic muscles
tibialis anterior: dorsiflexion - inversion & supination
extensor hallucis longus: dorsiflexion
extensor digitorum longus: dorsiflexion
fibularis tertius: dorsiflexion & eversion (pronatin
What additional action do the extensor digiroum longus and extensor hallucis longus do /
Extend the toes
what nerve runs through the anterior compartment
the deep fibular nerve (L4-L5)
Name the lateral compartment extrinsic muscles
Fibularis longus
Fibularis Brevis
What actions do the lateral compartment muscles perform
eversion and plantarflexion
What does the fibularis longus do
eversion/pronation and plantar flextion. also supports the arches structure of foot
What do tibialis and fibularis longus have in common
both support the arches structure of the foot
What nerve runs through lateral compartment
superficial fibular nerve
What is ultimate job of lateral compartment muscles
to prevent excessive inversion of the foot
Name the posterior superficial compartment muscles
Gastrocnemius
Soleus
Plantaris
What nerve innervates the superficial compartment muscles
Tibial nerve
What two things does the gastrocnemius do
plantarflexion of the foot at ankle joint and flexes knee
What does the soleus do
plantarflexion of foot
What does plantaris do
plantarflexion of foot and flexes knee joing. Not a vital muscle
Name the muscles in the posterior deep compartment
Posterior tibialis
Flexor digitorum longus
Flexor hallucis longus
Which two posterior deep compartment muscles help flex the toes
Flexor digitorum longus
Flexor hallucis longus
What do all three deep compartment muscles help do
plantarflexion and inversion/supination
What does Tom, Dick and nervous Harry mean
anterior leg muscles that insert onto the foot
Tibialis Posterior
Flexor Digitorum Longus
Posterior Tibial Artery
Tibial Nerve
Flexor Hallucis Longus
These five tendons and nerves all run down in order from closest to the medial malleolus to furthest, underneath the medial malleolus on their way to their attachment point
