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Title

Dissociation between Goal-directed and Discrete Response Localization in a Patient with Bilateral Cortical Blindness

Authors
Tamietto, Marco
De Gelder, Beatrice
Published in Journal of Cognitive Neuroscience. 2013, vol. 25, no. 10, p. 1769-1775
Abstract We investigated localization performance of simple targets in patient TN, who suffered bilateral damage of his primary visual cortex and shows complete cortical blindness. Using a two-alternative forced-choice paradigm, TN was asked to guess the position of left-right targets with goal-directed and discrete manual responses. The results indicate a clear dissociation between goal-directed and discrete responses. TN pointed toward the correct target location in approximately 75% of the trials but was at chance level with discrete responses. This indicates that the residual ability to localize an unseen stimulus depends critically on the possibility to translate a visual signal into a goal-directed motor output at least in certain forms of blindsight.
Keywords BlindsightMovement
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Article (Published version) (285 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Research groups Neuropsychologie expérimentale
Cognition visuelle
Brain and Language Lab (926)
Project FNS: 320030-144187
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(ISO format)
BUETTI, Simona et al. Dissociation between Goal-directed and Discrete Response Localization in a Patient with Bilateral Cortical Blindness. In: Journal of Cognitive Neuroscience, 2013, vol. 25, n° 10, p. 1769-1775. https://archive-ouverte.unige.ch/unige:30786

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Deposited on : 2013-10-29

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