Neuropsychologia (2008)
Abstract |
Some patients with a lesion to the striate cortex (V1), when assessed through forced-choice paradigms, are able to detect stimuli presented in the blind field, despite reporting a complete lack of visual experience. This phenomenon, known as blindsight, strongly implicates V1 in visual awareness. However, the view that V1 is indispensable for conscious visual perception is challenged by a recent finding that the blindsight subject GY can be aware of visual qualia in his blind field, implying that V1may not be critical under all circumstances. This apparent contradiction raises the following question: if V1 is not always necessary for phenomenal awareness, why do V1 lesions have such a detrimental effect on conscious perception? It is suggested here that this contradiction can be resolved by considering the impact of V1 lesions on the functioning of the whole visual cortex.
|
Keywords | blindsight primary visual cortex transcranial magnetic stimulation |
Categories | (categorize this paper) |
Options |
![]() ![]() ![]() ![]() |
Download options
References found in this work BETA
No references found.
Citations of this work BETA
Conscious Vision for Action Versus Unconscious Vision for Action?Berit Brogaard - 2011 - Cognitive Science 35 (6):1076-1104.
Using Brain Stimulation to Disentangle Neural Correlates of Conscious Vision.Tom A. de Graaf & Alexander T. Sack - 2014 - Frontiers in Psychology 5.
Bandpass Characteristics of High-Frequency Sensitivity and Visual Experience in Blindsight.Doerthe Seifert, Christine Falter, Hans Strasburger & Mark A. Elliott - 2010 - Consciousness and Cognition 19 (1):144-151.
Similar books and articles
Transcranial Magnetic Stimulation of Early Visual Cortex Interferes with Subjective Visual Awareness and Objective Forced-Choice Performance.Mika Koivisto, Henry Railo & Niina Salminen-Vaparanta - 2011 - Consciousness and Cognition 20 (2):288-298.
Visual Experience and Blindsight: A Methodological Review.Morten Overgaard - 2011 - Experimental Brain Research 209:473-479.
Blindsight and Visual Awareness.Paul Azzopardi & Alan Cowey - 1998 - Consciousness and Cognition 7 (3):292-311.
Blindsight in Action: What Can the Different Sub-Types of Blindsight Tell Us About the Control of Visually Guided Actions?James Danckert & Yves Rossetti - 2005 - Neuroscience and Biobehavioral Reviews 29 (7):1035-1046.
Striate Cortex (V1) Activity Gates Awareness of Motion.Juha Silvanto, Alan Cowey, Nilli Lavie & Vincent Walsh - 2005 - Nature Neuroscience 8 (2):143-144.
The Role of Primary Visual Cortex (V1) in Visual Awareness.Victor A. F. Lamme, H. Landman Super, P. R. R. Roelfsema & H. Spekreijse - 2000 - Vision Research 40 (10):1507-21.
Analytics
Added to PP index
2009-01-28
Total views
438 ( #21,414 of 2,498,992 )
Recent downloads (6 months)
1 ( #421,180 of 2,498,992 )
2009-01-28
Total views
438 ( #21,414 of 2,498,992 )
Recent downloads (6 months)
1 ( #421,180 of 2,498,992 )
How can I increase my downloads?
Downloads