CFO Anatomy & Physiology 3 — Questions and Answers
Question 1: The sustentaculum tali is a bony shelf found on which tarsal bone?
- Talus
- Navicular
- Calcaneus (Correct answer)
- Cuboid
Correct answer: Calcaneus
The sustentaculum tali is a medial projection of the calcaneus that supports the head of the talus.
Question 2: Which ligament primarily prevents excessive eversion of the subtalar joint?
- Plantar calcaneonavicular (spring) ligament
- Anterior talofibular ligament
- Deltoid ligament (Correct answer)
- Bifurcate ligament
Correct answer: Deltoid ligament
The deltoid ligament is a strong medial ligament complex that resists eversion and lateral displacement of the talus.
Question 3: Which component of the gait cycle immediately follows heel strike?
- Toe-off
- Loading response (Correct answer)
- Terminal stance
- Pre-swing
Correct answer: Loading response
Loading response immediately follows heel strike as the foot accepts body weight and the foot contacts the ground fully.
Question 4: The peroneus longus tendon passes under which bony structure to reach the plantar foot?
- Sustentaculum tali
- Navicular tuberosity
- Cuboid groove (Correct answer)
- Calcaneal tuberosity
Correct answer: Cuboid groove
The peroneus longus tendon passes through the groove on the inferior surface of the cuboid to reach the plantar foot.
Question 5: Which artery is the primary blood supply to the dorsum of the foot?
- Posterior tibial artery
- Peroneal artery
- Dorsalis pedis artery (Correct answer)
- Sural artery
Correct answer: Dorsalis pedis artery
The dorsalis pedis artery, a continuation of the anterior tibial artery, is the primary supply to the dorsal foot.
Question 6: During normal gait, the center of pressure travels from the heel to which part of the foot at toe-off?
- Lateral forefoot and fifth toe
- Medial heel
- First and second metatarsal heads then hallux (Correct answer)
- Cuboid region
Correct answer: First and second metatarsal heads then hallux
The center of pressure progresses from the heel across the midfoot to the first and second metatarsal heads and then to the hallux at toe-off.
Question 7: Which muscle inverts the foot and plantarflexes the ankle?
- Tibialis anterior
- Peroneus brevis
- Tibialis posterior (Correct answer)
- Extensor digitorum longus
Correct answer: Tibialis posterior
The tibialis posterior inverts the foot and assists in plantarflexion, also supporting the medial longitudinal arch.
CFO Anatomy & Physiology 3
The sustentaculum tali is a bony shelf found on which tarsal bone?