The Talocrural Joint and Foot Flashcards
Primary Pantar Flexors
Gastrocnemius, Soleus, Tibialis Posterior
Primary Dorsiflexors
Tibialis Anterior, Peroneus Tertius (absent in some peeps)
Primary Evertors
Peroneus Brothers - longs, brevis, and tertius
AKA as fibularis longus, fibularis brevis, fibularis tertius
Primary Invertors
Tibialis Anterior, Tibialis Posterior
Tibialis Anterior
Tendon swings down ANT & MED
O: SUP 2/3rds lateral tibia
I: MED aspect of MED cuneiform & MED aspect of base of 1st metatarsal
A: Dorsiflexion, inversion foot
Peroneus Tertius
Absent in some people
O: distal 3rd anterior fibula
I: SUP/DOR aspect base of 5th metatarsal
A: dorsiflexion, eversion foot
Peroneus Longus
AKA fibularis longus
Tendon speeps down LAT & POST & under foot
O: head & SUP /2/3rds LAT fibula
I: Bottom MED cuneiform & base 1st metatarsal bone
A: evertor foot, plantar flexion
Peroneus Brevis
AKA fibularis Brevis Tendon sweeps down LAT & POST & under foot O: INF 2/3rds LAT fibula I: bottom 5th metatarsal bone A: evertor foot, plantar flexion
What important role do the peroneus longs and brevis play in how rigid or soft the ache of the foot is?
If they are active, they effect rigidness of arch. This allows foot to act as rigid bar for leverage in propulsion.
If they are relaxed, arches become soft and flexible. Essential for shock absorption.
Muscles of arch?
Medial longitudinal; lateral longitudinal; propulsion
What landmark act as pulleys in the ankle?
Malleoli. If tendon passes the malleolus anteriorly, muscle is a dorsiflexor. If tendon passes malleolus posteriorly, muscle is a plantar flexor. If tendon is medial, muscle is an inverter. If tendon is lateral, muscle is an evertor.
Seated calf raises work what muscle group?
Soleus, tibialis post, and peroneus longs and brevis will do more work.
What happens to the gastrocneumius when the knee is flexed and the ankle is plantar flexed?
gastrocnemius manifests active insufficiency
