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Fig 1. Selection of regions of interest. A, Visual stimuli shown to right and left hemifields corresponding to activation in left and right visual cortices. Stimuli were flashed with alternating black and white regions (100% contrast) at 6 Hz, alternating between left and right images every 20 seconds for 4 minutes. B, Activation maps in 1 subject from previously mentioned stimulation. Activation in the primary and extrastriate visual cortex is seen on the left in red and on the right in green. The yellow box on the sagittal view shows the brain region acquired for BOLD sequences. C, Left visual cortex time series. Slightly >3% increase in BOLD signal intensity is seen averaged across the left primary visual cortex cluster. Three minutes of data are shown.
