Muscular variation on the dorsum of the foot and alteration of structures passing under cover of the extensor retinacula of the lower limb – a case report

Thomas, Huban and Prasanna, LC and Suhani, S and Sneha, G and Babu, Prakash Billakanti (2015) Muscular variation on the dorsum of the foot and alteration of structures passing under cover of the extensor retinacula of the lower limb – a case report. Asia Pacific Journal of Research, I (XXV). pp. 26-28. ISSN 2347-4793

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Abstract

Extensor digitorum longus is one of the muscle of the anterior crural region of the leg, arises from the upper part of the medial surface of the shaft of fibula, a small area of lateral tibial condyle, interosseous membrane and anterior intermuscular septum of the leg. The tendon of the extensor digitorum longus lies on the lower part of the tibia passes beneath the superior and inferior extensor retinaculum, finally split into four digital slips and joins with the lateral three slips of extensor digitorum brevis to form the dorsal digital expansion. Anterior tibial artery is the main artery of the anterior crural region which lies between the extensor halluces longus and extensor digitorum longus in the lower third of the leg and appears on the dorsum of the foot as dorsalis pedis artery. During routine dissection for undergraduate medical students,in a middle aged male cadaver an additional tendon was observed in theextensor digitorum longusand is attached to the middle of the shaft of the fifth metatarsal bone.Anterior tibial artery lies lateral to the peroneus tertius muscle in the lower third of the leg, then it passes medially deep to the peroneus tertius and extensor digitorum longus muscles. Lateral tarsal artery arises from the dorsalis pedis artery and lies lateral to the deep peroneal nerve while the main trunk lies medial to the nerve beneath the inferior extensor retinaculum of the lower limb. Awareness of presence of an additional tendon in the dorsum of the foot and variation in the course of the anterior tibial artery is crucial while treating the compartment syndrome.

Item Type: Article
Uncontrolled Keywords: Extensor digitorum longus; anterior tibial artery; compartment syndrome.
Subjects: Medicine > KMC Manipal > Anatomy
Depositing User: KMC Manipal
Date Deposited: 17 Jun 2015 11:45
Last Modified: 17 Jun 2015 11:45
URI: http://eprints.manipal.edu/id/eprint/143049

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