p488fig13.12 (left column) How incentive motivational feedback amplifies activity of a sensory cortical cell population.  (right column) A sensory cortical cell population whose activity is amplified by incentive motivational feedback can suppress the activities of less activated populations via self-normalizing recurrent competitive interactions.<BR>||  Motivational feedback and blocking.  (left) sensory input CS, STM activity without motivational feedback, STM activity with motivational feedback.  (right) STM suppressed by competition, STM amplified by (+) feedback.