Trans-saccadic priming in hemianopia: sighted-field sensitivity is boosted by a blind-field prime

Ritchie, Kay L. and Hunt, Amelia R. and Sahraie, Arash (2012) Trans-saccadic priming in hemianopia: sighted-field sensitivity is boosted by a blind-field prime. Neuropsychologia, 50 (5). pp. 997-1005. ISSN 0028-3932

Full content URL: http://dx.doi.org/10.1016/j.neuropsychologia.2012....

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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.

Keywords:eye movements
Subjects:C Biological Sciences > C800 Psychology
C Biological Sciences > C830 Experimental Psychology
C Biological Sciences > C860 Neuropsychology
Divisions:College of Social Science > School of Psychology
ID Code:24064
Deposited On:19 Sep 2016 09:18

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