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Nature 443, 132-133 (14 September 2006) | doi:10.1038/443132b; Published online 13 September 2006

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'Vegetative' patient shows signs of conscious thought

Michael Hopkin

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Evidence of brain activity raises issues for neurologists.

The question of whether outwardly unresponsive patients may in fact be aware of their surroundings is one of the most heated debates in clinical neuroscience, with huge implications for the way such patients are diagnosed and treated. In a remarkable study published last week, researchers report that a patient who meets all the criteria of being in a 'vegetative state' can perform mental tasks on request.