Bassett Collection of Stereoscopic Images of Human Anatomy

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Posterior aspect of left ankle and foot

Peroneus accessorius muscle; long flexor tendons in relation to ankle, posterior view

Image #199-4

KEYWORDS: Ankle, Foot and toes, Muscles and tendons.

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Posterior aspect of left ankle and foot

Peroneus accessorius muscle; long flexor tendons in relation to ankle, posterior view

The peroneus longus and brevis muscles have been cut off. A peroneus accessorius muscle (7) is present with a small muscular portion attached to the lateral side of the calcaneus and a slender tendon extending upward to blend with the posterior intermuscular septum of the leg. The calcaneal tendon has been divided slightly above its attachment of the calcaneus.

1 .	Fibula
2 .	Posterior intermuscular septum
3 .	Tendon of accessory peroneus muscle
4 .	Superior peroneal retinaculum (divided)
5 .	Groove for peroneal tendons
6 .	Calcaneal branch of peroneal artery
7 .	Accessory peroneus muscle
8 .	Tendo calcaneus
9 .	Rete calcaneum
10 .	Peroneus longus muscle (tendon, cut off)
11 .	Tuberosity of calcaneus
12 .	Flexor hallucis longus muscle
13 .	Posterior tibial artery
14 .	Calcaneal branch of the posterior tibial artery
15 .	Tibial nerve (pointer on medial plantar nerve, cut off)
16 .	Lateral plantar nerve
17 .	Flexor retinaculum (opened to expose tendons)
18 .	Flexor hallucis longus muscle (tendon)
19 .	Flexor digitorum longus muscle (tendon)
20 .	Tibialis posterior muscle (tendon)
21 .	Flexor hallucis brevis muscle