Spatio-temporal prediction and inference by V1 neurons

Guo, Kun and Robertson, Robert G and Pulgarin, Maribel and Nevado , Angel and Panzeri, Stefano and Thiele, Alexander and Young, Malcolm P (2007) Spatio-temporal prediction and inference by V1 neurons. European Journal of Neuroscience, 26 (4). pp. 1045-1054. ISSN 0953-816X

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Spatio-temporal prediction and inference by V1 neurons
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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1460-...

Abstract

In normal vision, visual scenes are predictable, as they are both spatially and temporally redundant. Evidence suggests that the visual system may use the spatio-temporal regularities of the external world, available in the retinal signal, to extract information from the visual environment and better reconstruct current and future stimuli. We studied this by recording neuronal responses of primary visual cortex (area V1) in anaesthetized and paralysed macaques during the presentation of dynamic sequences of bars, in which spatio-temporal regularities and local information were independently manipulated. Most V1 neurons were significantly modulated by events prior to and distant from stimulation of their classical receptive fields (CRFs); many were more strongly tuned to prior and
distant events than they were to CRFs bars; and several showed tuning to prior information without any CRF stimulation. Hence, V1 neurons do not simply analyse local contours, but impute local features to the visual world, on the basis of prior knowledge of a visual world in which useful information can be distributed widely in space and time.

Item Type:Article
Additional Information:In normal vision, visual scenes are predictable, as they are both spatially and temporally redundant. Evidence suggests that the visual system may use the spatio-temporal regularities of the external world, available in the retinal signal, to extract information from the visual environment and better reconstruct current and future stimuli. We studied this by recording neuronal responses of primary visual cortex (area V1) in anaesthetized and paralysed macaques during the presentation of dynamic sequences of bars, in which spatio-temporal regularities and local information were independently manipulated. Most V1 neurons were significantly modulated by events prior to and distant from stimulation of their classical receptive fields (CRFs); many were more strongly tuned to prior and distant events than they were to CRFs bars; and several showed tuning to prior information without any CRF stimulation. Hence, V1 neurons do not simply analyse local contours, but impute local features to the visual world, on the basis of prior knowledge of a visual world in which useful information can be distributed widely in space and time.
Keywords:contextual influences, orientation tuning, primary visual cortex, spatio-temporal regularity
Subjects:C Biological Sciences > C800 Psychology
C Biological Sciences > C850 Cognitive Psychology
C Biological Sciences > C830 Experimental Psychology
Divisions:College of Social Science > School of Psychology
ID Code:5876
Deposited By: Alison Wilson
Deposited On:15 Jun 2012 12:51
Last Modified:13 Mar 2013 09:11

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