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The gain of evoked responses for targets presented at perceptual threshold are predictive of whether or not the target is perceived. It is unknown whether gain modulations are spatially specific as activity in non-target locations are not often studied in the context of sensory processing. Do non-target locations also show gain modulations in spontaneous activity that are correlated with detection sensitivity? To test this, we measured neural activity (single-unit and multi-unit activity) across area MT using chronically implanted Utah arrays in common marmosets (Callithrix jacchus) performing a visual detection task. We measured spike rates (1) for neurons whose receptive fields encompassed the target location and (2) for neurons recorded on adjacent electrodes, whose receptive fields excluded the target location. We find, as expected, that the likelihood that the target is detected increases with the target-evoked spike …