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J Med Case Rep. 2011 Aug 18;5:393. doi: 10.1186/1752-1947-5-393.

The cadaver of a Caucasian man with a supernumerary fourth dorsal interosseous muscle in the right hand: a case report.

Author information

1
Department of Anatomy, Medical School, Aristotle University of Thessaloniki, P,O, Box: 300, Postal Code: 54124, Thessaloniki, Greece. natsis@med.auth.gr.

Abstract

INTRODUCTION:

The human hand is a complex anatomic entity consisting of many muscles, nerves, and vessels, thus providing a special ability to perform accurate and meticulous movements. In this group of muscles are the four dorsal interosseous muscles.

CASE PRESENTATION:

A distinct supernumerary fourth dorsal interosseous muscle was found in the right hand of the cadaver of a 76-year-old Caucasian man without any other concomitant abnormality.

CONCLUSIONS:

The presence of such an additional muscle in the hand should be considered in the management of hand deformities, whether the treatment is conservative or surgical.

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