It is unlikely that the nerve signal being sent from the eye to the brain can be precise enough to preserve submillisecond timing differences, says Greene. Also, for the brain to coordinate nerve signals being sent from opposite sides of the retina, communication between the two hemispheres would be needed. It strains credulity that these additional processing steps could be accomplished while preserving submillisecond precision in the responses to pair members, Greene says. He thinks it is more likely that cell structures in the retina link the responses prior to sending the information to the visual cortex. The retina itself may be assessing global relationships among boundary locations, these operations being required for recognition of the shape.
|Contact: Ernest Greene|
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