chapter  9
20 Pages

The Evolution of Behavioral and Brain Asymmetries: Bridging Together Neuropsychology and Evolutionary Biology

Introduction Three very important characteristics of our species, language, right-handedness and tool

use, have been traditionally associated with a single and (allegedly) unique characteristic of the human brain, namely hemispheric specialization. The phenomenon of hemispheric specializa­ tion (or brain lateralization or asymmetry) refers to the different functional specialization of the left and right side of the brain. For instance, in most (right-handed) individuals of our species the brain mechanisms for language production are located in the left hemisphere.1