Experimental design. A) The monkey sat in a primate chair in front of a computer screen. After fixation of the central point (for a random duration comprised between 500 and 1200 ms), an auditory, visual, or audiovisual stimulus was presented for 250 ms. The monkey had to maintain fixation during stimulus presentation to obtain a reward. B) Three static visual stimuli were presented (always the same picture for each): A picture of random dots, a macaque face and a rattlesnake. C) T3 MRI slices of the brain of monkey C in a frontal section (top, left) and in a sagittal section (top, right) showing electrode position. Drawings below MRI pictures show the cerebral regions delimited by the boxes in the MRI slices, labeled according to macaque brain atlases (Paxinos et al. 2000; Saleem and Logothetis 2007). PuM: Medial pulvinar, PuL: Lateral pulvinar, PuI: Inferior pulvinar, PuA: Anterior pulvinar, BrSC: Superior colliculus brachium, LV: Lateral ventricle, cc: Corpus callosum.