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