Developing attention in typical children related to disabilities.

Overview

We define attention by three basic functions. The first is obtaining and maintaining the alert state. The second is orienting overtly or covertly to sensory stimuli. The third is selection among competing responses. These three functions correspond to three separable brain networks. Control of the alert state develops in infancy but continues to change till adulthood. During childhood, the orienting network provides a means of controlling affective responses, e.g., by looking away from negative events and toward positive or novel events. The executive network mediates between competing voluntary responses by resolving conflicts. Executive control improves rapidly over the first 7 years of life. Autistic spectrum disorders and attention deficit hyperactivity disorder are two disorders that have been shown to involve deficits in attention networks. We examine connections between developing attention networks and these disorders.