Figure 4. Multisensory neurons responsive to incongruent AV stimuli. Rasters and SDFs of two single cells during the presentation of auditory (blue SDFs), visual (red SDFs), congruent (purple SDFs), and incongruent (black SDFs) stimuli. Same conventions as in Figure 3. A, Cell A exhibited multisensory enhancement when the two congruent unimodal stimuli are combined in A1V1 (A*V interaction, p < 0.05, early stimulus period, two-way MANOVA; MMI = 0.181). However, it shows incongruent suppression to the A2V1 compared with the congruent A1V1 stimulus (purple vs black SDFs, p < 0.05, early stimulus period, one-way MANOVA, post hoc Tukey). B, Cell B was both bimodal and nonlinear multisensory (A2, p = 0.003, late stimulus period; V2, p < 0.0001, late stimulus period; A*V interaction, p = 0.046, early stimulus period) and demonstrated multisensory suppression during A1V1 compared with V1 (MMI = −0.051, early stimulus period; MMI = −0.213, late stimulus period). Cell B demonstrated incongruent enhancement to the A2V1 compared with the congruent A2V2 stimuli (purple vs black SDFs, p = 0.02, late stimulus period, one-way MANOVA, post hoc Tukey). C, Population response of VLPFC multisensory neurons that exhibited suppression to an incongruent stimulus (n = 10, gray SDF, with SEM) compared with the congruent response (purple SDF with SEM).