Week 11 Lecture - Foot Ligaments

How many sets of muscles and retinacula are in the leg?

3 sets of muscles and 3 sets of retinacula

Where is the flexor retinaculum located?

between medial malleolus and calacaneus

where is the superior fibular retinaculum located?

between lateral malleolus and calcaneus

where is the inferior fibular retianculum located?

attached to both sides of calcaneus

where is the superior extensor retinaculum located?

between tibia and fibula above malleoli

what is the inferior extensor retinaculum also called?

cruciate ligament (y-shaped)

What muscles form triceps surae?

gastrocnemius and soleus

Which retinacula are visible in the dorsal view of foot?

• superior/inferior extensor

• inferior fibular

which retinacula are visible in the lateral view of the foot?

• superior/inferior fibular

• superior/inferior extensor

Which retinacula are visible in the medial view of the foot?

• superior/inferior extensor

• flexor retinaculum

How is weight transmitted through the foot?

leg-talus-calcaneus-head of metatarsals

What are the parts of the longitduinal arch?

Medial/Lateral Sides (starts with calcaneus) Med. = 3 metatarslas Lat = 2 metatarsals

What is the transverse arch?

Curvature across foot

• medial side highest

• posteriorly

• anteriorly

What type of joint is the ankle (talocrural) joint?

Hinge joint, tightest in dorsiflexion

What does the medial (deltoid) ligament resist?

4 parts:

• anterior/posterior

• tibiotalar

• tibiocalcaneal

• tibionavicular

What do the lateral ligaments of the ankle control?

Inversion, 3 parts

• anterior/posterior

• talofibular

• calcaneofibular

What are the main ligaments supporting the foot arches?

• Plantar calcaneonavicular (spring) ligament

• long plantar ligament

• dorsal tarsal ligaments are usually thin

What are interosseous tarsal ligaments?

Ligaments between adjacent tarsals

Name some intertarsal ligaments.

• Subtalar

• talocalcaneonavicular

• calcaneocuboid

• transverse tarsal

• cuneonavicular

What is the function of the transverse tarsal ligament?

• inversion/eversion

• flexion/extension

• changes arch height