Functional magnetic resonance imaging (fMRI) data showing basic neural circuitry associated with a volitional saccade (antisaccade) task. Data are shown on axial, sagittal and coronal slices with colors indicating increased signal associated with execution of a volitional saccade task. Data were acquired from 32 subjects on a 1.5T MRI system and are shown using radiological convention (right hemisphere on the left side). FEF, frontal eye field; SEF, supplementary eye field; PFC, prefrontal cortex; ACC, anterior cingulate cortex; IPS, intraparietal sulcus. Adapted from Dyckman et al, 2007.