Eur J Anat, 3 (1): 41-49 (1999)

Isokinetic handedness in the abduction-adduction movement of shoulder

Carrascosa Sanchez J., Gomez Pellico L., Slocker de Arce A., Clemente de Arriba C., Fernandez-Camacho J.

Dept. of Morphological Sci./Surg., School of Medicine, Alcala University, 600 Alcala de Henares, E-28871 Madrid, Spain

ABSTRACT In view of the heterogeneity of samples and the diversity of the results reflected in the literature. The aim of our study was to examine the behaviour of handedness in the upper limbs using isokinetic analysis. We took a sample of 30 men and 30 women, each group comprising of 20 right-handed and 10 left-handed subjects. Using a BIODEX 2000 dynamometer (Biodex Medical Systems, Inc. Brookhaven R and D Plaza 20 Ramsay Road. Box 702 Shirley. New York. 11967-0702), the individuals were subjected to an isokinetic evaluation of the abduction-adduction movement of each upper limb, at a speed of 60 and 120°/s, following a rigorous protocol. The sample was divided by sex and handedness, after which both extremities were compared at both speeds and movements. In the right-handed subjects of both sexes, the mean values of the isokinetic parameters regarding force and work were significantly higher in their dominant limb. However, in the left-handed group, these statistical differences did not appear; therefore, the handedness of their left upper limb was not shown.

Keywords: adult, arm movement, article, controlled study, device, dynamometry, female, force, handedness, human, human experiment, isokinetic exercise, left handedness, male, normal human, right handedness, shoulder, velocity, work