Motion-sensing cells in the eye let the brain ‘know’ about directional changes

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How do we “know” from the movements of speeding car in our field of view if it’s coming straight toward us or more likely to move to the right or left?Scientists have long known that our perceptions of the outside world are processed in our cortex, the six-layered structure in the outer part of our brains. But how much of that processing actually happens in cortex?