Prime-sight and blindsight

Consciousness and Cognition 11 (4):568-581 (2002)
Listening to subject’s commentaries can be a useful spur to novel scientific departures, as in studies of blindsight. Recently further testing has been possible with subject DB, who was a blindsight patient tested intensively over a period of 10 years and who was the subject of the book, . Essentially his original capacity is the same or somewhat more sensitive. Some further types of discriminations have now been tested that were not possible in the original study. But a new feature was discovered, namely that he describes conscious after-images of a wide range of inducing stimuli of which he is unconscious. The properties of the after-images are briefly described, such as their occurrence following unseen colour patches, luminance changes, shape, spatial frequency, their long durations, showing inter-ocular transfer, as well as their conforming to Emmert’s Law. Various approaches are discussed towards finding the source of their generation, such as the use of after-images of colour mixes of separate inputs to the two eyes . They are also discussed in terms of after-images in normal subjects that are generated by imagination. The discovery offers a rare potential opportunity to compare the brain activity associated with both the conscious and unconscious attributes of the precisely the same stimuli in the same locus in the same subject
Keywords *Afterimage  *Consciousness States  *Visual Perception
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DOI 10.1016/S1053-8100(02)00015-6
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References found in this work BETA
Consciousness Lost and Found.Lawrence Weiskrantz - 1997 - Oxford University Press.
The Neurobiology of Blindsight.Alan Cowey & Petra Stoerig - 1991 - Trends in Neurosciences 14:140-5.
Blindsight - Putting Beta (?) on the Back Burner.Lawrence Weiskrantz - 2001 - In Beatrice De Gelder, Edward H. F. De Haan & Charles A. Heywood (eds.), Out of Mind: Varieties of Unconscious Processes. Oxford University Press. pp. 20-31.

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Citations of this work BETA
Imaginative Contagion.Tamar Szabó Gendler - 2006 - Metaphilosophy 37 (2):183-203.
Afterimages and Sensation.Ian Phillips - 2013 - Philosophy and Phenomenological Research 87 (2):417-453.
Direct Assessment of Qualia in a Blindsight Participant.N. Persaud & H. Lau - 2008 - Consciousness and Cognition 17 (3):1046-1049.
Blindsight.Basileios Kroustallis - 2005 - Philosophical Psychology 18 (1):31-43.

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Visual Experience and Blindsight: A Methodological Review.Morten Overgaard - 2011 - Experimental Brain Research 209:473-479.
Relative Blindsight in Normal Observers and the Neural Correlate of Visual Consciousness.Hakwan C. Lau & Richard E. Passingham - 2006 - Proceedings of the National Academy of Sciences of the United States of America 103 (49):18763-18768.
Blindsight.Basileios Kroustallis - 2005 - Philosophical Psychology 18 (1):31-43.

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