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Evaluation of Bilateral Asymmetry in the Humerus of Human Skeletal Specimen | Chapter 03 | Emerging Research in Medical Sciences Vol. 3

Several studies have established a relationship between morphological and behavioural asymmetry making investigations of bilateral bone asymmetry an attractive and important research area. The purpose of this study was to investigate bilateral asymmetry patterns of skeletal specimen from five geographical locations (Rwanda, Burundi, Congo, Kenya and Uganda) at Galloway Osteological Collection, Department of Anatomy, School of Biomedical Sciences, Makerere University College of Health Sciences at Makerere University.

The angle of torsion and retroversion, mid shaft circumference, length and weight of 232 pairs of humeri were determined. A Torsiometer was used to measure the angle of torsion in degrees according to Krahl and Evans 1945, a tape was used to measure the mid shaft circumference at the level of the apex of the deltoid V and the length in cm was determined. An osteomeric board was used to measure the length of the humerus in centimeters. A weighing balance was used to measure the weight of the humerus in grams.

The analysis of humeral asymmetry with respect to parameters of the human skeletal specimen at the Galloway Osteological collection Mulago revealed bilateral asymmetrical status observed in the angle of torsion, length, weight and mid-shaft circumference. Our result mostly showed lateralization to the right in all the parameters investigated except the torsion angle which is to the left.

Our investigation revealed that humeral torsion is inversely proportional to weight, length and mid-shaft circumference of the humerus. This study established the existence of bilateral asymmetries in the humeri of all the geographical regions investigated with more asymmetry observed in the male compared with the female.

Author(s) Details

Samuel S. Dare
Department of Human Anatomy, Faculty of Biomedical Sciences, Kampala International University Western Campus, Uganda and Anatomy Unit, School of Medicine, Kabale University, Uganda.

Godfery Masilili
Department of Human Anatomy, Faculty of Biomedical Sciences, Kampala International University Western Campus, Uganda and Department of Human Anatomy, School of Health Sciences, Makarere University, Uganda.

Kintu Mugagga [Bvm, Mvm, PhD- Fellow]
Department of Human Anatomy, Faculty of Biomedical Sciences, Kampala International University Western Campus, Uganda.

Peter E. Ekanem
Anatomy Unit, Department of Biomedical, Mekelle University, Ethiopia.

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