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

Article Article scientifique Article Dissociation between Goal-directed and Discrete Response Localization in a Patient with Bilateral Cortical Blindness eng 2013 author Buetti Simona 527809 author Tamietto Marco author Hervais-Adelman Alexis 0000-0002-5232-626X 703161 Alexis Adelman author Kerzel Dirk 0000-0002-2466-5221 603960 author De Gelder Beatrice author Pegna Alan 31713 1769-1775 10.1162/jocn_a_00404 0898-929X 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. Blindsight Movement Dewey 150 Dewey 616.8 Swiss National Science Foundation Visual processing of behaviourally relevant stimuli: how fast are they processed 144187 CH Project funding 61 Département des neurosciences cliniques 226 108 Section de psychologie 71 false 1333 Brain and Language Lab 596 Cognition visuelle 636 Neuropsychologie expérimentale Journal of cognitive neuroscience 25 10 19a4b260-ccbf-4ef8-9a5b-24afe38e7e0b Article (Published version) Restricted Buetti_2013_JOCN.pdf 291977 application/pdf restrictedAccess Faculté de médecine / Section de médecine clinique / Département des neurosciences cliniques Faculté de psychologie et des sciences de l'éducation / Section de psychologie

Title	Published in	Year	Views	Downloads

Dissociation between Goal-directed and Discrete Response Localization in a Patient with Bilateral Cortical Blindness	Journal of cognitive neuroscience	2013	524	0
Evaluation of the Simon effect in response programming and under different eye movement instructions: An analysis of goal-directed and symbolic responses		2009	1,064	31

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Buetti, Simona