ABFAS ABFAS Surgical Anatomy and Biomechanics 2

Question 1

The sinus tarsi is located between which two bones?

Accepted Answer

Talus and calcaneus

Answer

The sinus tarsi is the cone-shaped space located between the talus superiorly and calcaneus inferiorly, containing the interosseous talocalcaneal ligament.

Question 2

Which of the following describes the normal foot pronation-supination axis of the subtalar joint?

Accepted Answer

Oblique axis passing medially, anteriorly, and superiorly

Answer

The subtalar joint axis is oblique, passing medially, anteriorly, and superiorly at approximately 16° from vertical and 42° from horizontal.

Question 3

Hallux valgus deformity is primarily associated with which biomechanical finding?

Accepted Answer

Increased intermetatarsal angle between the first and second metatarsals

Answer

Hallux valgus is radiographically characterized by an increased first-second intermetatarsal angle (normal ≤9°) along with an increased hallux abductus angle.

Question 4

Which blood supply is most critical to the talus and most commonly disrupted in talar neck fractures?

Accepted Answer

Artery of the tarsal canal (branch of posterior tibial artery)

Answer

The artery of the tarsal canal, a branch of the posterior tibial artery, is the primary blood supply to the talar body and is frequently disrupted in talar neck fractures, risking avascular necrosis.

Question 5

The Lisfranc ligament connects which two structures?

Accepted Answer

Medial cuneiform to second metatarsal base

Answer

The Lisfranc ligament runs from the medial cuneiform to the base of the second metatarsal and is the primary stabilizer of the Lisfranc (tarsometatarsal) joint complex.

(ABFAS) American Board of Foot and Ankle Surgery Practice Test

(ABFAS) American Board of Foot and Ankle Surgery Practice Test

ABFAS ABFAS Surgical Anatomy and Biomechanics 2