Intermediate Navicular Bone Quiz

Q1. What is the shape of the proximal articular surface of the navicular?

• Flat and nonarticular
• Cylindrical
• Convex
• Concave

Q2. How many principal distal facets does the navicular have for the cuneiforms?

• Two
• Five
• Three
• One

Q3. Which cuneiform articulates with the largest medial distal facet of the navicular?

• Lateral cuneiform
• Intermediate cuneiform
• Medial cuneiform
• Cuboid

Q4. Which ligament supports the head of the talus immediately inferior to the talonavicular region?

• Plantar calcaneonavicular ligament
• Long plantar ligament only
• Anterior talofibular ligament
• Calcaneofibular ligament

Q5. Why is the navicular tuberosity readily palpable?

• It projects medially in the superficial medial midfoot
• It is covered by the fibula
• It lies deep within the ankle mortise
• It is located on the plantar calcaneus

Q6. How does tibialis posterior help support the medial longitudinal arch through the navicular?

• Its navicular insertion helps dynamically support the medial arch
• It inserts exclusively on the calcaneus
• It pulls only on the fifth metatarsal
• It acts only at the knee

Q7. Which joint combines with the calcaneocuboid joint to form the transverse tarsal joint?

• First tarsometatarsal joint
• Metatarsophalangeal joint
• Talonavicular joint
• Ankle joint

Q8. Which bone may have a variable articulation with the lateral side of the navicular?

• Calcaneus
• First metatarsal
• Fibula
• Cuboid

Q9. What lies directly distal to the navicular in the medial column of the foot?

• Calcaneus
• Proximal phalanges
• Cuneiform bones
• Talus

Q10. Why is the navicular often described as a keystone region of the medial longitudinal arch?

• It lies outside the weight-bearing foot
• It creates the lateral malleolus
• It forms the posterior heel
• Its position links the talar head to the distal medial column near the arch summit