Hostname: page-component-8448b6f56d-gtxcr Total loading time: 0 Render date: 2024-04-23T14:07:05.358Z Has data issue: false hasContentIssue false

Phenomenology without conscious access is a form of consciousness without top-down attention

Published online by Cambridge University Press:  27 March 2008

Christof Koch
Affiliation:
Division of Biology, California Institute of Technology, Pasadena, CA 91125
Naotsugu Tsuchiya
Affiliation:
Division of Humanities and Social Sciences, Psychology and Neuroscience, California Institute of Technology, Pasadena, CA, 91125. koch.christof@gmail.comhttp://klab.caltech.edu/~koch/naotsu@gmail.comhttp://www.emotion.caltech.edu/~naotsu/Site/index.html

Abstract

We agree with Block's basic hypothesis postulating the existence of phenomenal consciousness without cognitive access. We explain such states in terms of consciousness without top-down, endogenous attention and speculate that their correlates may be a coalition of neurons that are consigned to the back of cortex, without access to working memory and planning in frontal cortex.

Type
Open Peer Commentary
Copyright
Copyright © Cambridge University Press 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Crick, F. & Koch, C. (1995) Are we aware of neural activity in primary visual cortex? Nature 375:121–23.Google Scholar
Crick, F. (1998a) Consciousness and neuroscience. Cerebral Cortex 8:97107.Google Scholar
Crick, F. (1998b) Why is there a hierarchy of visual cortical and thalamic areas: The no-strong loops hypothesis. Nature 391:245–49.CrossRefGoogle Scholar
Crick, F. (2005) What is the function of the claustrum? Philosophical Transactions of the Royal Society of London B 360:1271–319.Google Scholar
Driver, J. & Vuilleumier, P. (2001) Perceptual awareness and its loss in unilateral neglect and extinction. Cognition 79(1–2):3988.Google Scholar
Fearing, F. (1970) Reflex action MIT Press.Google Scholar
Harrison, R. V., Harel, N., Panesar, J. & Mount, R. J. (2002) Blood capillary distribution correlates with hemodynamic-based functional imaging in cerebral cortex. Cerebral Cortex 12(3):225–33.Google Scholar
Iwasaki, S. (1993) Spatial attention and two modes of visual consciousness. Cognition 49:211–33.Google Scholar
Koch, C. (2004) The quest for consciousness: A neurobiological approach. Roberts.Google Scholar
Koch, C. & Tsuchiya, N. (2007) Attention and consciousness: Two distinct brain processes. Trends in Cognitive Sciences 11:1622.Google Scholar
Lamme, V. A. F. (2003) Why visual attention and awareness are different. Trends in Cognitive Sciences 7(1):1218.CrossRefGoogle ScholarPubMed
Landman, R., Spekreijse, H. & Lamme, V. A. F. (2003) Large capacity storage of integrated objects before change blindness. Vision Research 43(2):149–64.CrossRefGoogle ScholarPubMed
Logothetis, N. K. (2003) The underpinnings of the BOLD functional magnetic resonance imaging signal. Journal of Neuroscience 23(10):3963–71.CrossRefGoogle ScholarPubMed
Logothetis, N. K. & Wandell, B. A. (2004) Interpreting the BOLD signal. Annual Review of Physiology 66:735–69.Google Scholar
Mathiesen, C., Caesar, K., Akgoren, N. & Lauritzen, M. (1998) Modification of activity-dependent increases of cerebral blood flow by excitatory synaptic activity and spikes in rat cerebellar cortex. Journal of Physiology 512(Pt 2):555–66.Google Scholar
Reddy, L., Wilken, P. & Koch, C. (2004) Face-gender discrimination is possible in the near absence of attention. Journal of Vision 4:106–17.Google Scholar
Rees, G., Wojciulik, E., Clarke, K., Husain, M., Frith, C. & Driver, J. (2000) Unconscious activation of visual cortex in the damaged right hemisphere of a parietal patient with extinction. Brain 123(Pt 8):1624–33.Google Scholar
Rees, G., Wojciulik, E., Clarke, K., Husain, M., Frith, C. & Driver, J. (2002b) Neural correlates of conscious and unconscious vision in parietal extinction. Neurocase 8:387–93.Google Scholar
Sackeim, H. A., Nordlie, J. W. & Gur, R. C. (1979) A model of hysterical and hypnotic blindness: Cognition, motivation, and awareness. Journal of Abnormal Psychology 88(5):474–89.CrossRefGoogle Scholar
Sperling, G. (1960) The information available in brief visual presentations. Psychological Monographs: General and Applied 74(11, Whole No. 498):129. [Whole issue.]Google Scholar
Tsuchiya, N. & Koch, C. (2008) The relationship between consciousness and attention. In: The neurology of consciousness, ed. Laureys, S. & Tononi, G.. Elsevier.Google Scholar