PC Podiatrist Foot & Ankle Structure 3

Question 1

The calcaneofibular ligament (CFL) resists inversion stress primarily when the ankle is in which position?

Accepted Answer

Neutral or dorsiflexion

Answer

The CFL is taut when the ankle is in neutral or dorsiflexion, becoming the primary restraint to inversion in those positions unlike the ATFL which is taut in plantarflexion.

Question 2

Which artery is the primary blood supply to the talus and is most at risk in talar neck fractures?

Accepted Answer

Artery of the tarsal sinus and deltoid branches

Answer

The talus receives blood primarily via the artery of the tarsal sinus (from the dorsalis pedis/perforating peroneal) and the deltoid branch; talar neck fractures disrupt these, risking avascular necrosis.

Question 3

The medial longitudinal arch is primarily maintained dynamically by which tendon?

Accepted Answer

Tibialis posterior

Answer

The tibialis posterior tendon is the primary dynamic support of the medial longitudinal arch; its insufficiency leads to adult-acquired flatfoot deformity.

Question 4

The spring (plantar calcaneonavicular) ligament primarily supports which structure?

Accepted Answer

Head of the talus

Answer

The spring ligament forms a sling under the talar head, supporting it and maintaining the medial longitudinal arch; its attenuation contributes to flatfoot.

Question 5

Which osseous structure forms the lateral wall of the tarsal tunnel?

Accepted Answer

Calcaneus

Answer

The tarsal tunnel is bordered laterally and inferiorly by the calcaneus, medially by the flexor retinaculum, and superiorly by the medial malleolus.

(PC) Podiatrist Certification Practice Test

(PC) Podiatrist Certification Practice Test

PC Podiatrist Foot & Ankle Structure 3