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Trends Cogn Sci. 2003 Aug;7(8):328-330.

Visual dreams in the congenitally blind?

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Neurobiology Section, Swammerdam Institute for Life Sciences, University of Amsterdam, The Netherlands


An EEG study of sleep in congenitally blind persons revealed a significant correlation between the visual activity reported during dreaming and the decrease of alpha strength recorded from the central and occipital regions of the scalp. This provides the first objective evidence that subjects who have never had visual experiences can have dreams with virtual images that are probably mediated by the activation of the cortical areas responsible for visual representations.

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