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Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 7. Lower Limb

Atlas of Human Anatomy in Cross Section: Section 7. Lower Limb

Plate 7.33

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Plate 7.33

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Tendon m. extensor hallucis longus
2. Medial (first) cuneiform
3. Great saphenous v.
4. Tendon m. tibialis anterior
5. Navicular
6. Medial (deltoid) ligament
7. Plantar calcaneonavicular ("spring") ligament

8. Calcaneus
9. Tendon m. tibialis posterior
10. Tendon m. flexor hallucis longus
11. Posterior tibial a. and v.
12. Medial plantar nerve
13. Lateral plantar nerve
14. Tendon m. plantaris
15. Calcaneal tendon (Achilles)

16. Small saphenous v.
17. Sural nerve
18. Calcaneus
19. Tendon m. peroneus longus
20. Tendon m. peroneus brevis
21. Interosseous talocalcaneal ligament
22. Abductor digiti minimi m.

23. Extensor digitorum brevis m.
24. Cuboid
25. Cuneocuboid and plantar cuboideonavicular ligaments
26. Extensor digitorum brevis m.
27. Tendon m. extensor digitorum longus
28. Lateral cuneiform
29. Tendon m. extensor digitorum longus
30. Second metatarsal, base
31. Intermediate cuneiform
32. Tendon m. extensor digitorum longus

This section passes through the calcaneus (8, 18); the cuboid (24); navicular (5); the medial (first) (2), intermediate (second) (31), and lateral (third) (28) cuneiforms; and the second metatarsal (30). It cuts the cuneocuboid (25), plantar cuboideonavicular (25), interosseous talocalcaneal (21), plantar calcaneonavicular ("spring") (7), and medial (deltoid) (6) ligaments.

The plantar calcaneonavicular ligament (7) is a thick, dense plate of fibroelastic tissue. It extends from the sustentaculum tall and the distal surface of the calcaneus to the whole width of the inferior surface of the navicular bone. Medially, it blends with the anterior part of the medial ligament of the ankle joint and, laterally, with the plantar margin of the calcaneonavicular part of the bifurcate ligament. It is thickest at its medial margin (4 to 5 mm). In contact with the inferior surface of the ligament is the tendon of tibialis posterior muscle, supporting the head of the talus and thereby augmenting a function of the ligament. Because it is fibroelastic, the plantar calcaneonavicular ligament is also known as the "spring" ligament.

The plantar cuboideonavicular ligament (25) is a well-defined band of connective tissue that extends laterally from the plantar surface of the navicular to the depression on the medial surface of the cuboid, and slightly onto its plantar surface.

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