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Adaptive shape coding for perceptual decisions in the human brain.


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Authors

Welchman, Andrew E 

Abstract

In its search for neural codes, the field of visual neuroscience has uncovered neural representations that reflect the structure of stimuli of variable complexity from simple features to object categories. However, accumulating evidence suggests an adaptive neural code that is dynamically shaped by experience to support flexible and efficient perceptual decisions. Here, we review work showing that experience plays a critical role in molding midlevel visual representations for perceptual decisions. Combining behavioral and brain imaging measurements, we demonstrate that learning optimizes feature binding for object recognition in cluttered scenes, and tunes the neural representations of informative image parts to support efficient categorical judgements. Our findings indicate that similar learning mechanisms may mediate long-term optimization through development, tune the visual system to fundamental principles of feature binding, and optimize feature templates for perceptual decisions.

Description

Keywords

Brain Mapping, Cerebral Cortex, Decision Making, Form Perception, Humans, Learning, Neuronal Plasticity

Journal Title

J Vis

Conference Name

Journal ISSN

1534-7362
1534-7362

Volume Title

15

Publisher

Association for Research in Vision and Ophthalmology (ARVO)
Sponsorship
Wellcome Trust (095183/Z/10/Z)
European Commission (290011)
Leverhulme Trust (RF-2011-378)
This work was supported by a Wellcome Trust Senior Research Fellowship to AEW (095183/Z/10/Z) and grants to ZK from the Biotechnology and Biological Sciences Research Council (H012508), a Leverhulme Trust Research Fellowship (RF-2011-378) and the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007-2013/ under REA grant agreement no. PITN-GA-2011-290011.