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LeftishBrit

(41,310 posts)
4. No evidence for this bizarre theory
Wed Jan 11, 2012, 07:29 PM
Jan 2012

Blindsight does indeed suggest more than one system for visual perception. The term refers to people who are blind in (usually part of) the visual field because of damage to the visual cortex, but who still show some response to stimuli in that part of the visual field: e.g. they may guess when a light appears there, more often correctly than would be expected by chance. It is thought that this reflects the functioning of a more primitive part of the brain, the superior colliculus, which allows people and animals to orient to visual stimuli, but is not nearly as sophisticated as the visual cortex.

But 'more than one system for visual perception' does not equal 'living organisms make invisible mirror copies of themselves'!

Phantom limbs occur because the brain representations for sensations from a limb continue to function even if the limb is amputated. Again, nothing to do with 'invisible mirror copies'.

Overall, individuals have a lot more than two 'information systems'; the brain is very complex, with numerous systems for handling and representing different forms of information. None of which has anything to do with 'mirror worlds'.

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