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The anatomical and physiological properties of the visual cortex argue against cognitive penetration

  • Moshe Gur (a1)


We are consciously aware of visual objects together with the minute details that characterize each object. Those details are perceived instantaneously and in parallel. V1 is the only visual area with spatial resolution and topographical exactitude matching perceptual abilities. For cognition to penetrate perception, it needs to affect V1 image representation. That is unlikely because of the detailed parallel V1 organization and the nature of top-down connections, which can influence only large parts of the visual field.



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Gilbert, C. D. & Wu, L. (2013) Top-down influences of visual processing. Nature Reviews of Neuroscience 14:350–63.
Gur, M. (2015) Space reconstruction by primary visual cortex activity patterns: A parallel, non-computational mechanism of object representation. Trends in Neuroscience 38:207–15.
Gur, M., Kagan, I. & Snodderly, M. (2005) Orientation and direction selectivity of single cells in V1 of alert monkeys: Functional relationships and laminar distributions. Cerebral Cortex 15:1207–21.
Gur, M. & Snodderly, D. M. (2008) Physiological differences between neurons in layer 2 and layer 3 of primary visual cortex (V1) of alert macaque monkeys. Journal of Physiology (London) 586:2293–306.
Ito, M., Tamura, H., Fujita, I. & Tanaka, K. (1995) Size and position invariance of neuronal responses in monkey inferotemporal cortex. Journal of Neurophysiology 73:218–26.
Rockland, K. S. (1994) The organization of feedback connections from area V2 (18) to V1 (17). In: Primary visual cortex in primates, ed. Peters, A. & Rockland, K. S., pp. 261–99. Plenum Press.


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