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Variation In Peroneus Teritius Tendon And Its Clinical Implications.

Author(s): Chintan Rohitkumar Bhatt, Meenaxi Sanjay Bansal, Chandrakant D Mehta

Journal: Journal of Orthopaedics
ISSN 0972-978X

Volume: 7;
Issue: 2;
Date: 2010;
Original page

Keywords: Peroneus tertius muscle | variation | dissection.

Peroneus tertius (PT) is a muscle of the anterior compartment of the leg. The PT muscle originates from the anterior surface of the fibula and the interosseous membrane and inserts into the medial side of the dorsal region of the fifth metatarsal bone. We have dissected 94 cadavers to see the variation in the Peroneus tertius muscle, we found some or the other variation in 8 cases, and absence of muscle in 10 cases. In the variation the common variation is that the PT tendon arises from the tendon the fourth digitations of the extensor digitorium longus or just an extension of it. Usually, the PT is involved in dorsiflexion and eversion of the foot. In many cases, the absence of PT maybe asymptomatic and it may be incidentally detected during cadaveric dissections or autopsies. The existence of PT may help in the swing phase of bipedal walking. The PT may be used for tendon graft surgeries. The pull of the PT may be responsible for causing stress on the fifth metacarpal and account for all stress fractures in any individual. The absence of the PT may puzzle any transplant and foot surgeons performing graft operations. We as anatomists discuss the clinical implications of the variations of PT.
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