Lateralization

Definition
noun
Localization of a function or activity on one side of the body in consistent preference to the other.
Supplement
An individual having a body with two distinct sides (e.g. left and right sides) would normally develop a tendency to use one side in preference to the other. For instance in brain, lateralization involves localization of certain functions and activities to either left or right side of the brain. Analytical, logical, and verbal functions, as well as skills for exact calculation and literal language are localized in the left hemisphere. Holistic, prosodic and intuitive functions, including skills for approximate calculations and contextual language are localized in the right hemisphere.
Word origin: from the contraption of lateral, from Latin laterālis, of the side +-ization.
Related forms: lateralize (verb), laterality (noun).