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Monday, March 16, 2009

Brains

Patient X has suffered a stroke. His eyes can still take in visual stimuli, but the primary part of his visual cortex has been destroyed. He is blind. He cannot even distinguish light from dark. You can show him pictures of circles or squares, or ask him to distinguish between photos of men or women, and he has no idea what is in front of him. You can show him snarling animal faces or calm animal faces, he has nothin got say, but if you show him pictures of angry or happy human faces, he can guess what the emotions are. He has what has come to be known as blindsight.

"Human" - Michael Gazzaniga (159)

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