The term, "hemispheric cerebral dominance," expresses the concept that the two hemispheres of the human brain are not equivalent in function, and that each hemisphere appears to possess distinctive functional properties which are not shared by the other. The concept is in essence a restricted formulation of the more general concept of cerebral localization which states that different areas of the brain subserve different sensory, motor, or mental functions; in brief, that the human brain is not a functionally equipotential organ.