The dynamics of object-selective activation correlate with recognition performance in humans

To investigate the relationship between perceptual awareness and brain acti vity, we measured both recognition performance and fMRI signal from object- related areas in human cortex while images were presented briefly using a m asking protocol. Our results suggest that recognition performance is correl ated with selective activation in object areas. Selective activation was co rrelated to object naming when exposure duration was varied from 20 to 500 milliseconds. Subjects' recognition during identical visual stimulation cou ld be enhanced by training, which also increased the fMRI signal. Overall, the correlation between recognition performance and fMRI signal was highest in occipitotemporal object areas (the lateral occipital complex).