Neural Correlates of Visuospatial Attention to Unseen Stimuli in Hemianopic Patients. A Steady-State Visual Evoked Potential Study.

Frontiers in Psychology
Javier Sanchez-LopezC A Marzi

Abstract

The relationship between attention and awareness is a topic of great interest in cognitive neuroscience. Some studies in healthy participants and hemianopic patients have shown dissociation between these two processes. In contrast, others confirmed the classic notion that the two processes are mutually exclusive. To try and cast further light on this fascinating dilemma, in the present study we have investigated the neural mechanisms of visual spatial attention when perceptual awareness is totally lacking. To do that, we monitored with steady-state visual evoked potentials (SSVEPs) the neurophysiological correlates of endogenous spatial attention to unseen stimuli presented to the blind field of hemianopic patients. Behaviourally, stimulus detection (a brief change in the orientation of a gabor grating) was absent in the blind hemifield while in the sighted field there was a lower, but non-significant, performance in hit rate with respect to a healthy control group. Importantly, however, in both blind and sighted hemifield of hemianopics (as well as in healthy participants) SSVEP recordings showed an attentional effect with higher frequency power in the attended than unattended condition. The scalp distribution of this effect w...Continue Reading

References

Nov 1, 1975·Journal of Psychiatric Research·M F FolsteinP R McHugh
Dec 1, 1974·Brain : a Journal of Neurology·L WeiskrantzJ Marshall
May 14, 1996·Proceedings of the National Academy of Sciences of the United States of America·S T MorganS A Hillyard
Feb 1, 1997·Journal of Experimental Psychology. Human Perception and Performance·P A McCormick
Oct 27, 1998·Consciousness and Cognition·P Azzopardi, A Cowey
Oct 13, 1999·Proceedings. Biological Sciences·R W KentridgeL Weiskrantz
Mar 4, 2000·Nature Neuroscience·J B HopfingerG R Mangun
Feb 9, 2002·Human Brain Mapping·Francesco Di RussoSteven A Hillyard
May 8, 2002·Nature Reviews. Neuroscience·Maurizio Corbetta, Gordon L Shulman
Mar 24, 2004·Neuropsychologia·R W KentridgeL Weiskrantz
Dec 1, 2006·Journal of Neurology, Neurosurgery, and Psychiatry·Lies BouwmeesterCees Lucas
Feb 2, 2008·Neuropsychologia·R W KentridgeC A Heywood
May 10, 2008·Neuron·Maurizio CorbettaGordon L Shulman
Oct 3, 2008·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Steven L BresslerMaurizio Corbetta
Dec 8, 2009·Progress in Neurobiology·François-Benoît VialatteAndrzej Cichocki
Jul 21, 2010·Proceedings of the National Academy of Sciences of the United States of America·S K Andersen, M M Müller
Feb 1, 2012·Frontiers in Psychology·Catherine Tallon-Baudry
Mar 1, 2012·Frontiers in Human Neuroscience·Valentin WyartCatherine Tallon-Baudry
Apr 20, 2012·Consciousness and Cognition·Shena LuShihui Han
Jul 10, 2013·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Simone VosselGereon R Fink
Jun 4, 2014·Trends in Cognitive Sciences·Ned Block
Apr 10, 2015·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Michael J GrayJohn J Foxe
Mar 13, 2017·Neuropsychologia·Laura HerrerosAna B Chica
Oct 11, 2017·Neuropsychologia·Javier Sanchez-LopezCarlo A Marzi
Nov 15, 2017·Proceedings of the National Academy of Sciences of the United States of America·Alessia CeleghinMarco Tamietto
Jun 26, 2018·General Physiology and Biophysics·Milan Mitka, Igor Riečanský

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Citations

Feb 2, 2020·Journal of Neuroengineering and Rehabilitation·Laura Mena-GarciaJuan F Arenillas
Oct 10, 2020·Attention, Perception & Psychophysics·Alexander Maier, Naotsugu Tsuchiya

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