Dissection of plantar aspect of left foot

Nerve supply to dorsal interosseous muscles; interior of first metatarsophalangeal joint

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Image #202-4

Dissection of plantar aspect of left foot

Nerve supply to dorsal interosseous muscles; interior of first metatarsophalangeal joint

The plantar interossei have been detached and removed from the dissection to provide a better view of the dorsal interossei and their nerves. In addition, the capsule of the first metatarsophalangeal joint has been opened by a wide incision to expose the interior of the joint.

1. Sesamoid bone
2. 1st metatarsophalangeal articular capsule (opened)
3. Head of 1st metatarsal bone
4. Plantar metatarsal artery
5. Deep plantar branch of dorsalis pedis artery (joining plantar arch)
6. Perforating branch
7. Tarsometatarsal articular capsule
8. Medial cuneiform bone
9. Tuberosity of navicular bone
10. Tendon of tibialis posterior muscle (cut off)
11. Dorsal interosseous muscles
12. Branches of lateral plantar nerve to interosseous muscle
13. 5th metatarsal bone
14. Flexor digiti minimi brevis muscle
15. Plantar arch
16. Deep branch lateral plantar nerve
17. Tendon of peroneus longus muscle (exposed within opened tendon sheath)
18. Long plantar ligament
19. Sesamoid fibrocartilage in tendon of peroneus longus
20. Calcaneocuboid plantar ligament