PMID: 8942452Dec 1, 1996Paper

Backward versus forward visual masking deficits in schizophrenic patients: centrally, not peripherally, mediated?

The American Journal of Psychiatry
D S SaccuzzoD L Braff

Abstract

Schizophrenic patients have repeatedly demonstrated the inability to rapidly process information when tasks are timed or the processing load is relatively high. Schizophrenic patients show consistent deficits in the visual backward masking paradigm. In visual backward masking, an informational target stimulus is presented, followed after an interstimulus interval by a masking stimulus that interferes with or interrupts target identification. In order to clarify whether the visual backward masking deficits of schizophrenic patients are indeed central rather than peripheral in origin, the authors compared visual backward masking to psychometrically matched visual forward masking performance in 35 normal comparison subjects and then 35 schizophrenic patients. In visual forward masking, the mask precedes the target, and visual forward masking mechanisms are felt to be more peripheral (retinal) than are visual backward masking mechanisms. For psychometrically matched forward and backward masking tasks, the schizophrenic patients had a selective and differential deficit in the backward masking condition. These results support the interpretation that the observed visual backward masking deficits of schizophrenic patients are centrally...Continue Reading

Citations

Mar 9, 2004·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Eric Granholm, Steven P Verney
Jan 1, 2009·The International Journal of Neuroscience·Bernt C Skottun, John R Skoyles
Dec 3, 2002·International Journal of Methods in Psychiatric Research·Michael Foster GreenBruno Breitmeyer
May 27, 2009·Psychiatry Research·Michael H Herzog, Andreas Brand
Dec 2, 2004·Psychiatry Research·Michael H HerzogAndreas Brand
Sep 6, 2005·Biological Psychiatry·Michael F GreenJim Mintz
Jan 9, 2010·NeuroImage·Danai DimaHinderk M Emrich
Jun 8, 2007·Neuron·Charles D Gilbert, Mariano Sigman
Mar 25, 2008·Schizophrenia Bulletin·Anne GierschMark A Elliott
Nov 5, 2003·Proceedings of the National Academy of Sciences of the United States of America·Stanislas DehaeneJean-Luc Martinot
Nov 26, 2008·Journal of Clinical and Experimental Neuropsychology·Laurent HolzerMichael H Herzog
May 3, 2005·European Archives of Psychiatry and Clinical Neuroscience·Andreas BrandMichael H Herzog
Aug 27, 2009·The World Journal of Biological Psychiatry : the Official Journal of the World Federation of Societies of Biological Psychiatry·Bernt C Skottun, John R Skoyles

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