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Review
. 1999 Apr;32(1):35-45.
doi: 10.1016/s0167-8760(98)00062-2.

Alpha-band oscillations in visual cortex: part of the neural correlate of visual awareness?

T V Sewards  1 , M A Sewards
Affiliations
Review

Alpha-band oscillations in visual cortex: part of the neural correlate of visual awareness?

T V Sewards et al. Int J Psychophysiol. 1999 Apr.

Abstract

It was originally proposed that synchronized gamma-band oscillations in neurons of the visual cortex constitute the neural correlate of visual awareness. Two hypotheses are presented in this article: (a) both alpha-band and gamma-band oscillatory activity correspond to visual awareness; and (b) alpha-band activity occurs in the parvocellular processing pathway and gamma-band activity occurs in the magnocellular pathway, and the two modes of oscillation are correlated. It is further proposed that the frequency of the gamma-band oscillation in a group of neurons representing a particular visual scene segment is three times that of the alpha-band oscillation in the neurons representing the same segment. These hypotheses are discussed in relation to recent neurophysiological and psychophysiological experiments.

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Comment in

  • Comment on Sewards and Sewards (1999).
    Shaw JC. Shaw JC. Int J Psychophysiol. 1999 Aug;33(2):177-9. doi: 10.1016/s0167-8760(99)00029-x. Int J Psychophysiol. 1999. PMID: 10489082 No abstract available.

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