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Channel surfing in the visual brain

Sowden, PT and Schyns, PG (2006) Channel surfing in the visual brain TRENDS IN COGNITIVE SCIENCES, 10 (12). pp. 538-545.

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Vision provides us with an ever-changing neural representation of the world from which we must extract stable object categorizations. We argue that visual analysis involves a fundamental interaction between the observer's top-down categorization goals and the incoming stimulation. Specifically, we discuss the information available for categorization from an analysis of different spatial scales by a bank of flexible, interacting spatial-frequency (SF) channels. We contend that the activity of these channels is not determined simply bottom-up by the stimulus. Instead, we argue that, following perceptual learning a specification of the diagnostic, object-based, SF information dynamically influences the top-down processing of retina-based SF information by these channels. Our analysis of SF processing provides a case study that emphasizes the continuity between higher-level cognition and lower-level perception.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Psychology
Authors :
Date : 1 December 2006
Identification Number : 10.1016/j.tics.2006.10.007
Uncontrolled Keywords : Science & Technology, Social Sciences, Life Sciences & Biomedicine, Behavioral Sciences, Neurosciences, Psychology, Experimental, Neurosciences & Neurology, Psychology, BEHAVIORAL SCIENCES, NEUROSCIENCES, PSYCHOLOGY, EXPERIMENTAL, SPATIAL-FREQUENCY, LETTER IDENTIFICATION, LATERAL INTERACTIONS, MASKING EXPERIMENTS, CONTRAST DETECTION, SCENE PERCEPTION, RECOGNITION, INFORMATION, CORTEX, MODEL
Related URLs :
Additional Information : © 2006. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Depositing User : Symplectic Elements
Date Deposited : 01 Sep 2015 10:04
Last Modified : 01 Sep 2015 10:04

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