Muscles - Posterior, Anterior, Lateral Leg Flashcards
What innervates and supplies blood to the entire posterior leg compartment?
Tibial N. Posterior Tibial A.
What actions (in general) do the following leg compartments do?
1) Posterior
2) Anterior
3) Lateral
1) Posterior
Plantarflexion, Inversion
2) Anterior
Dorsiflexion, Inversion
3) Lateral
Eversion
What muscles are in the superficial group?
1) Gastrocnemius M
2) Soleus M
3) Plantaris M
Gastrocnemius
Action
- Flex leg at knee
- Plantarflexion
Lateral Head
O: Superior to Lat. Condyle of Femur
I: Calcaneus via Achilles Tendon (calcaneus tendon)
Medial Head
O: Superior to medial condyle of femur
I: Calcanues via achilles tendon
Soleus M
Action
Plantarflexion
Origin: Soleal Line of Tibia, Body of Fibula
Insertion: Calcaneus via achilles t.
Plantaris M.
AKA the Freshman N.
Action
Weak plantarflexion, proprioception of leg in space
Origin: Lateral Supracondylar Line
Insertion: Calcaneus via achilles t.
What are the deep posterior compartment muscles?
*Medially to Laterally*
1) Flexor Digitorum Longus M.
2) Tibialis Posterior M.
3) Flexor Hallucis Longus M.
Superior to them all…
4) Popliteus M.
Popliteus M.
Action
Unlocks extended knee by laterally/externally rotating femur on stationary during walking
O: Lateral Femoral Condyle
I: Posterior tibia (proximal end)
Flexor Digitorum Longus M.
BONUS: where does the tendon pass?
Action
Plantarflexion, flex lateral four digits (DIPs)
O: Posterior Tibia (inferior to soleal line)
I: 2-5 base of DIPs
BONUS: Tendon passes over the FHL tendon to get to digits
Flexor Hallucis Longus M.
BONUS: what bone structure does the tendon run inferior too?
Action:
Flex the fucking Big Toe
O: Posterior Fibula
I: Base of 1st DIP
Sustenticulum tali on the Talus
Tibialis Posterior M.
BONUS: What muscle tendon does it cross in the plantar foot that helps create transverse arch??
Action
Plantarflexion, foot inversion
O: Interosseus Membrane, Posterior Tibia, Posterior Fibula
I: Navicular, Medial Cuneiform Medial part of foot)
BONUS: Fibularis Longus M.
What muscles are in the Anterior Leg Compartment?
*Medially to Laterally*
Superficial
1) Tibialis Anterior M
2) Extensor Digitorum Longus M
Deep
3) Extensor Hallucis Longus M.
4) Fibularis Tertius
What innervates and supplies blood to the entire anterior compartment of the leg?
Deep Fibular N.
Anterior Tibial A.
Tibialis Anterior M.
Action
Dorsiflexion, Inversion
O: Lateral condyle of the tibia
I: Medial Cuniform
Extensor Digitorum Longus M.
Action
Dorsiflexion, extend 2-4 digits
O: Lateraly condyle of the tibia
I: EXTENSOR EXPANSION over 2-5 digits
