24. Understand the muscles of the lower leg, ankle and foot and their origins, insertions and actions Flashcards
8 muscles plantar flexing the ankle joint:
Gastrocnemius
Soleus
Plantaris
Fibularis (peroneus) longus
Fibularis (peroneus) brevis
Tibialis posterior
Flexor digitorum longus
Flexor hallucis longus
Origin of gastrocnemius:
Lateral head: Posterior aspect of the lateral condyle of the femur
Medial head: Posterior aspect of medial condyle of the femur
Insertion of gastrocnemius:
Posterior surface of the calcaneus via the calcaneal tendon
Which joint does the gastrocnemius use in plantar flexion?
Talocrural joint
Origin of soleus:
Posterior surface of the proximal fibula
Soleal line of the tibia
Insertion of soleus:
Posterior surface of calcaneus (via calcanea tendon)
Which joint does the soleus use for plantar flexion?
Talocrural joint
Origin of plantaris:
Lateral surpracondylar line of femur
Oblique popliteal ligament of knee
Insertion of plantaris:
Posterior surface of calcaneus (via calcaneal tendon)
What is another name for the calcaneal tendon?
The achilles tendon
Which joint does the plantaris use for plantar flexion?
Talocrural joint
Do a quiz game about the muscles of the lower leg.
:)
Origin of fibularis (peroneus) longus:
Lateral surface of the proximal fibula
Insertion of fibularis (peroneus) longus:
Medial cuneiform bone, metatarsal bone 1
Which joint does the fibularis (peroneus) longus use for plantar flexion?
Talocrural joint
Which joint does the fibularis (peroneus) longus use for foot eversion?
Subtalar joint
What does the fibularis (peroneus) longus support?
The longitudinal and transverse arches of the foot
Origin of fibularis (peroneus) brevis:
Lateral surface of distal fibula
Anterior intermuscular septum
Insertion of fibularis (peroneus) brevis:
Tuberocity of the 5th metatarsal bone
Which joint does the fibularis (peroneus) brevis use for plantar flexion?
Talocrural joint
Which joint does the fibularis (peroneus) brevis use for foot eversion?
Subtalar joint
Do a quiz game about the muscles of the ankle.
;)
Origin of tibialis posterior:
Posterior surface of tibia, posterior reface of fibula and interosseous membrane
Insertion of tibialis posterior:
Tuberocity of navicular bone, all cuneiform bones, cuboid bone, bases of metatarsal bones 2-4
Which joint does the tibialis posterior use for plantar flexion?
Talocrural joint
Which joint does the tibialis posterior use for foot inversion?
Subtalar joint