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Brain origins of 'blindsight' revealed

Brain origins of 'blindsight' revealed

作者:应罩鲥  时间:2019-03-01 03:02:11  人气:

SOME blind people have the remarkable ability to navigate physical obstacles without consciously perceiving them (see video, above). It now looks like they have their lateral geniculate nucleus (LGN) – part of the thalamus in the middle of the brain – to thank for this “blindsight”. That’s according to a team at the US National Institute of Mental Health in Bethesda, Maryland. They used macaques in which parts of the primary visual cortex had been destroyed. The monkeys’ eye-focusing movements, coupled with scans of brain activity, revealed that they were “seeing” images shown in the “blind” part of their visual field, but only if their LGN was intact (Nature, DOI: 10.1038/nature09179). More on these topics: