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Scientific article
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Top-down effects on early visual processing in humans: a predictive coding framework

Published inNeuroscience and biobehavioral reviews, vol. 35, no. 5, p. 1237-1253
Publication date2011
Abstract

An increasing number of human electroencephalography (EEG) studies examining the earliest component of the visual evoked potential, the so-called C1, have cast doubts on the previously prevalent notion that this component is impermeable to top-down effects. This article reviews the original studies that (i) described the C1, (ii) linked it to primary visual cortex (V1) activity, and (iii) suggested that its electrophysiological characteristics are exclusively determined by low-level stimulus attributes, particularly the spatial position of the stimulus within the visual field. We then describe conflicting evidence from animal studies and human neuroimaging experiments and provide an overview of recent EEG and magnetoencephalography (MEG) work showing that initial V1 activity in humans may be strongly modulated by higher-level cognitive factors. Finally, we formulate a theoretical framework for understanding top-down effects on early visual processing in terms of predictive coding.

Keywords
  • Animals
  • Attention/physiology
  • Brain Mapping
  • Electroencephalography
  • Electromyography
  • Humans
  • Learning/physiology
  • Magnetoencephalography
  • Models, Biological
  • Vision, Ocular/physiology
  • Visual Cortex/physiology
  • Visual Pathways/physiology
Citation (ISO format)
RAUSS, Karsten, SCHWARTZ, Sophie, POURTOIS, Gilles. Top-down effects on early visual processing in humans: a predictive coding framework. In: Neuroscience and biobehavioral reviews, 2011, vol. 35, n° 5, p. 1237–1253. doi: 10.1016/j.neubiorev.2010.12.011
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ISSN of the journal0149-7634
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