High Quality Content by WIKIPEDIA articles! N2pc refers to an ERP component linked to selective attention. The N2pc appears over visual cortex contralateral to the location in space to which subjects are attending; if subjects pay attention to the left side of the visual field, the N2pc appears in the right hemisphere of the brain, and vice-versa. This characteristic makes it a useful tool for directly measuring the general direction of a person`s attention (either left or right) with fine-grained temporal resolution.