Figure 8.

Individual fMRI responses during 5 and 100% contrast in a control participant (C1). Representative coronal slices demonstrating the striate (left column) and extrastriate (middle column) cortices during stimulation of the left (top row) or right (bottom row) hemifield. The far right column depicts activity corresponding significantly to a linear relationship with increasing contrast. Activation is superimposed on representative axial slices, centered on the peak voxel. Mixed-effects analyses, p < 0.001 uncorrected for a priori ROIs; elsewhere, cluster corrected, p < 0.05. Results displayed on T1-weighted structural images.