Category selectivity. A, Example SUA, selective responses to faces (both human and monkey) with almost no response to the other categories. B, Average SUA over all visually responsive units (N = 67). C, Net normalized response illustrating between- and within-category selectivity of all visually responsive SUAs (N = 67); the example SUA is depicted with arrows. D, Net normalized responses of all visually responsive MUA sites (N = 96).