Topic 6 - Bones and Joints of the Leg and Foot

Question 1

Describe the functional significance of the movements of eversion and inversion

Answer 1

• It allows for adjustment on uneven ground surfaces
• Hence foot to be converted from rigid to flexible
• Improves efficiency in gait.

Question 2

Identify and classifiy the ankle (talocrural) joint and identify and/ or describe its articular surfaces

Answer 2

Synovial uniaxial hinge

Dorsiflexion 30 degree

Plantarflexion 50 degrees

Tibia is female surface
Inferior (trochlear) surface of the tibia

Tibiotalar surface is weighbearing

Collateral ligaments provide medial and lateral reinforcement to the capsule

Question 3

If talus rolls anteriorly, what direction does it slide?

Answer 3

Posteriorly

Question 4

If the tibia rolls posteriorly, what direction does it slide?

Answer 4

Anteriorly

Question 5

What is the function of the tibionavicular and tibiocalcaneal ligaments?

Answer 5

together prevent abduction at ankle

Question 6

What is the function of the anterior tibiotalar and posterior tibiotalar ligaments?

Answer 6

Anterior Tibiotalar: Limits Plantar Flexion

Posterior Tibiotalar: Limit Dorsiflexion

Question 7

What is the function of the Posterior Talofibular ligament?

Answer 7

• Limits dorsiflexion

- Prevents anterior slide of Tibia and Fibula on Talus

Question 8

What is the function of the Calcaneofibular?

Answer 8

• Limits dorsiflexion

- Prevents adduction at ankle

Question 9

What is the function of the Anterior Talofibular ligament?

Answer 9

• Limits plantar flexion

- Prevents posterior slide of Tibia and Fibula on Talus

Question 10

Classify the Subtalar joint

Answer 10

Synovial, Multiaxial plane

Question 11

What is the movement of the interosseous (talocalcanean) ligament?

Answer 11

Controls inversion and eversion as well as talus