Generation of the VESPA response to rapid contrast fluctuations is dominated by striate cortex: Evidence from retinotopic mapping

► VESPA is an EEG response to rapid stochastic contrast modulation of visual stimuli. ► Useful for studying cognition and sensory processing in clinical groups. ► Cortical origin of VESPA not well characterized. ► We localize VESPA origin to striate cortex based on the stimulus used and the retinotopic sensitivity of the response.