European Journal of Anatomy

Official Journal of The Spanish Society of Anatomy
/> Cover Volume 12 - Number 2
Eur J Anat, 12 (2): 123-125 (2008)

Anomalous pronator quadratus muscle: A case report

Das S., Suhaimi F.H., Latiff A.A., Othman F.

Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia

ABSTRACT The pronator quadratus (PQ) muscle is one of the deeper muscle of the front of the forearm which originates from the oblique ridge in the lower part of the anterior surface of the shaft of the ulna and its adjoining medial area. The muscle inserts into the lower part of the anterior surface of the radius. In the present study, we observed an anomalous PQ muscles on both sides of a 52- year- old male cadaver during routine dissection. The muscle had dual origin from the ulna as well from the radius, and the two different bands of muscles had different directions of fibres in the downwards direction. Anomalies pertaining to the PQ muscle are not well documented in standard anatomy textbooks and the only source of information regarding its variations are found in research reports. The dual origin of the PQ as observed in the present study may be important from an anthropological point of view. Anatomical knowledge of the variations of the PQ may be beneficial for hand surgeons.

Keywords: adult, anatomical variation, arm muscle, article, cadaver, case report, human, human tissue, male, muscle cell, muscle malformation, pronator quadratus muscle, radius, surgical anatomy, ulna

European Journal of anatomy
ISSN 2340-311X (Online)