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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)
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.
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