Visual consciousness: Dissociating the neural correlates of perceptual transitions from sustained perception with fMRI
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jack Alan Reynolds
Learn more about PhilPapers
Consciousness and Cognition 13 (1):61-72 (2004)
To investigate the possible dichotomy between the neurophysiological bases of perceptual transitions versus sustaining a particular percept over time, an fMRI study was conducted with subjects viewing fragmented pictures. Unlike most other perceptually unstable stimuli, fragmented pictures give rise to only one perceptual transition and a continuous period of sustained perception. Earlier research is inconclusive on the subject of which anatomical regions should be attributed to what temporal aspect of perception, and the aim of the present study was to shed more light on the subject. In this study occipitotemporal and fronto-parietal regions were found to be activated for both aspects. However, regions in the medial-temporal lobe were activated specifically for transitions, whereas medial and dorsolateral prefrontal regions were activated specifically for sustained perception. These results provide further support for the theory that the initial creation of perceptual awareness and upholding perceptual awareness over time are separate processes involving different brain regions
|Keywords||*Awareness *Dissociation *Magnetic Resonance Imaging *Perceptual Orientation *Visual Perception Frontal Lobe Occipital Lobe Self Perception|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library|
References found in this work BETA
Geraint Rees, G. Kreiman & Christof Koch (2002). Neural Correlates of Consciousness in Humans. Nature Reviews Neuroscience 3 (4):261-270.
Stanislas Dehaene, Lionel Naccache, L. Jonathan Cohen, Denis Le Bihan, Jean-Francois Mangin, Jean-Baptiste Poline & Denis Rivière (2001). Cerebral Mechanisms of Word Masking and Unconscious Repetition Priming. Nature Neuroscience 4 (7):752-758.
Francis Crick & Christof Koch (1995). Are We Aware of Neural Activity in Primary Visual Cortex? Nature 375:121-23.
Andreas K. Engel, P. Fries, P. Kreiter Konig, M. Brecht & Wolf Singer (1999). Temporal Binding, Binocular Rivalry, and Consciousness. Consciousness and Cognition 8 (2):128-51.
D. L. Sheinberg & Nikos K. Logothetis (1997). The Role of Temporal Cortical Areas in Perceptual Organization. Proceedings of the National Academy of Sciences Usa 94:3408-3413.
Citations of this work BETA
No citations found.
Similar books and articles
Claudio Babiloni, Fabrizio Vecchio, Maurizio Miriello, Gian Luca Romani & Paolo Maria Rossini (2006). Visuo-Spatial Consciousness and Parieto-Occipital Areas: A High-Resolution EEG Study. Cerebral Cortex 16 (1):37-46.
Thomas Schmidt (2000). Visual Perception Without Awareness: Priming Responses by Color. In Thomas Metzinger (ed.), Neural Correlates of Consciousness. MIT Press 157--179.
Sander M. Daselaar, Mathias S. Fleck, Steven E. Prince & Roberto Cabeza (2006). The Medial Temporal Lobe Distinguishes Old From New Independently of Consciousness. Journal of Neuroscience 26 (21):5835-5839.
Deborah Giaschi, James E. Jan, Bruce Bjornson, Simon Au Young, Matthew Tata, Christopher J. Lyons, William V. Good & Peter K. H. Wong (2003). Conscious Visual Abilities in a Patient with Early Bilateral Occipital Damage. Developmental Medicine and Child Neurology 45 (11):772-781.
E. D. Lumer (2000). Binocular Rivalry and Human Visual Awareness. In Thomas Metzinger (ed.), Neural Correlates of Consciousness. MIT Press
D. H. Ffytche (2000). Imaging Conscious Vision. In Thomas Metzinger (ed.), Neural Correlates of Consciousness. MIT Press
Michel T. de Schotten, Marika Urbanski, Hugues Duffau, Emmanuelle Volle, Richard Lévy, Bruno Dubois & Paolo Bartolomeo (2005). Direct Evidence for a Parietal-Frontal Pathway Subserving Spatial Awareness in Humans. Science 309 (5744):2226-2228.
Gordon C. Baylis, Christopher L. Gore, P. Dennis Rodriguez & Rebecca J. Shisler (2001). Visual Extinction and Awareness: The Importance of Binding Dorsal and Ventral Pathways. Visual Cognition. Special Issue 8 (3):359-379.
Nilli Lavie (2006). The Role of Perceptual Load in Visual Awareness. Brain Research. Special Issue 1080 (1):91-100.
Added to index2009-01-28
Total downloads11 ( #312,747 of 1,907,220 )
Recent downloads (6 months)1 ( #466,442 of 1,907,220 )
How can I increase my downloads?