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Petro, L.S.; Paton, A.T.; Muckli, L. (2017)
Publisher: The Royal Society
Journal: Philosophical Transactions of the Royal Society B: Biological Sciences
Languages: English
Types: Article
Subjects: 133, Review Article, primary visual cortex, 1001, Articles, cortical feedback, auditory modulation

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mesheuropmc: genetic structures
Early visual cortex receives non-feedforward input from lateral and top-down connections (Muckli & Petro 2013 Curr. Opin. Neurobiol. 23, 195–201. (doi:10.1016/j.conb.2013.01.020)), including long-range projections from auditory areas. Early visual cortex can code for high-level auditory information, with neural patterns representing natural sound stimulation (Vetter et al. 2014 Curr. Biol. 24, 1256–1262. (doi:10.1016/j.cub.2014.04.020)). We discuss a number of questions arising from these findings. What is the adaptive function of bimodal representations in visual cortex? What type of information projects from auditory to visual cortex? What are the anatomical constraints of auditory information in V1, for example, periphery versus fovea, superficial versus deep cortical layers? Is there a putative neural mechanism we can infer from human neuroimaging data and recent theoretical accounts of cortex? We also present data showing we can read out high-level auditory information from the activation patterns of early visual cortex even when visual cortex receives simple visual stimulation, suggesting independent channels for visual and auditory signals in V1. We speculate which cellular mechanisms allow V1 to be contextually modulated by auditory input to facilitate perception, cognition and behaviour. Beyond cortical feedback that facilitates perception, we argue that there is also feedback serving counterfactual processing during imagery, dreaming and mind wandering, which is not relevant for immediate perception but for behaviour and cognition over a longer time frame.\ud \ud This article is part of the themed issue ‘Auditory and visual scene analysis’.

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Funded by projects

  • EC | HBP

Related to

  • fet-fp7FET Flagships: FET Flagships
  • fet-fp7FET Flagships: The Human Brain Project

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