Figure 4.

Group brain activity related to selective and divided attention. Four transverse slices through the visual, auditory, prefrontal, and cingulate cortex are presented. Activation in the primary sensory areas (visual and auditory cortex) decreased markedly during divided attention compared to selective attention. Prefrontal and cingulate gyrus activation increased during the divided attention task. Activation in the left prefrontal cortex was produced only in the divided attention task, but not during selective attention.