Figure 3.

Activations and multisensory enhancement. A, Schematic of core and belt fields summarizing the activation for all experiments with anesthetized animals (n = 7). Activations are quantified within each field as relative response (signal change for the respective condition as a fraction of the summed signal change across all three conditions). The bottom right panel displays the percentage enhancement of signal change from auditory to audiovisual conditions. B, Multisensory enhancement of individual voxels. Voxels exhibiting significant nonlinear enhancement of responses to combined audiovisual stimulation are shown color-coded on the same slices as used in Figure 1. The inset summarizes the fraction of sensory responsive voxels within individual fields that exhibited significant nonlinear enhancement. In all panels, color-coding indicates the mean across experiments, and only fields with significant activation or enhancement are colored: t test across experiments; *p < 0.05; **p < 0.01; ***p < 0.001 or higher.