Effects of Attention on Orientation-Tuning Functions of Single Neurons in Macaque Cortical Area V4

摘要: We examined how attention affected the orientation tuning of 262 isolated neurons in extrastriate area V4 and 135 V1 two rhesus monkeys. The animals were trained to perform a delayed match-to-sample task which oriented stimuli presented receptive field neuron being recorded. On some trials instructed pay those stimuli, on other they outside field. In this way, orientation-tuning curves could be constructed from neuronal responses collected behavioral states: one attended by animal ignored animal. fit Gaussians twelve different orientations for each state. Although enhanced (median 26% increase) 8% increase), selectivity, as measured width its curve, was not systematically altered attention. effects consistent with multiplicative scaling driven response all orientations. also found that did cause systematic changes undriven activity neurons.