Trans-saccadic priming in hemianopia

sighted-field sensitivity is boosted by a blind-field prime

Kay L. Ritchie, Amelia Hunt, Arash Sahraie

Research output: Contribution to journalArticle

2 Citations (Scopus)
6 Downloads (Pure)

Abstract

We experience visual stability despite shifts of the visual array across the retina produced by eye movements. A process known as remapping is thought to keep track of the spatial locations of objects as they move on the retina. We explored remapping in damaged visual cortex by presenting a stimulus in the blind field of two patients with hemianopia. When they executed a saccadic eye movement that would bring the stimulated location into the sighted field, reported awareness of the stimulus increased, even though the stimulus was removed before the saccade began and so never actually fell in the sighted field. Moreover, when a location was primed by a blind-field stimulus and then brought into the sighted field by a saccade, detection sensitivity for near-threshold targets appearing at this location increased dramatically. The results demonstrate that brain areas supporting conscious vision are not necessary for remapping, and suggest visual stability is maintained for salient objects even when they are not consciously perceived.
Original languageEnglish
Pages (from-to)997-1005
Number of pages9
JournalNeuropsychologia
Volume50
Issue number5
Early online date14 Feb 2012
DOIs
Publication statusPublished - Apr 2012

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Hemianopsia
Saccades
Retina
Visual Cortex
Eye Movements
Brain

Keywords

  • remapping
  • hemianopia
  • eye movements
  • attention

Cite this

Trans-saccadic priming in hemianopia : sighted-field sensitivity is boosted by a blind-field prime. / Ritchie, Kay L.; Hunt, Amelia; Sahraie, Arash.

In: Neuropsychologia, Vol. 50, No. 5, 04.2012, p. 997-1005.

Research output: Contribution to journalArticle

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