May 2008
Volume 8, Issue 6
Free
Vision Sciences Society Annual Meeting Abstract  |   May 2008
Perceptual filling-in of an artificial scotoma shows retinotopic specificity in human visual cortex
Author Affiliations
  • Rimona Weil
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, and Institute of Cognitive Neuroscience, University College London
  • Geraint Rees
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, and Institute of Cognitive Neuroscience, University College London
Journal of Vision May 2008, Vol.8, 1011. doi:10.1167/8.6.1011
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      Rimona Weil, Geraint Rees; Perceptual filling-in of an artificial scotoma shows retinotopic specificity in human visual cortex. Journal of Vision 2008;8(6):1011. doi: 10.1167/8.6.1011.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

When a featureless achromatic target is placed on a textured pattern and steadily viewed in peripheral vision, after a few seconds it seems to fill-in with the surrounding texture, similar to the experience of patients with scotomas from damage to the visual pathways. Such texture filling-in is thought to occur in early visual cortex, but the neural signals associated with texture filling-in of artificial scotomas in humans have not been fully explored. Here we used functional MRI to show that texture filling-in reflects retinotopically specific reductions in activity in human V1 and V2, accompanied by persistent signals associated with the invisible target.

Weil, R. Rees, G. (2008). Perceptual filling-in of an artificial scotoma shows retinotopic specificity in human visual cortex [Abstract]. Journal of Vision, 8(6):1011, 1011a, http://journalofvision.org/8/6/1011/, doi:10.1167/8.6.1011. [CrossRef]
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