Figure 1.

Illustration of fMRI BOLD (blood oxygen level dependent) responses in subject-specific visual and auditory thalamus (adapted from Noesselt et al.⁵³). Top: Brain section depicts visual (LGB, blue) and auditory (MGB, red) thalamus for one illustrative individual subject (for more details see Noesselt et al.⁵³). The bar graphs below of the brain sections depict the height of the fMRI-signal for the experimental conditions deduced from subject-specific ROIs (region of interest; see bar graphs, with grey bars for sound conditions and black for no-sound for the three visual stimuli: high intensity, low intensity, no visual target). An enhanced fMRI-signal was found when a sound was added to a lower-intensity visual target, but no significant change in response when the same sound was added to a higher-intensity visual target in accord with the behavioral findings.