Similarity of Cortical Activity Patterns Predicts Generalization Behavior

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Similarity of Cortical Activity Patterns Predicts Generalization Behavior

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Title: Similarity of Cortical Activity Patterns Predicts Generalization Behavior
Author(s):
Engineer, Crystal T.;
Perez, Claudia A.;
Carraway, Ryan S.;
Chang, Kevin Q.;
Roland, Jarod L.;
Sloan, Andrew M.;
Kilgard, Michael P.
Format: text
Item Type: article
Keywords: Speech sounds
Neuroplasticity
Neural stimulation
Rats as laboratory animals
Abstract: Humans and animals readily generalize previously learned knowledge to new situations. Determining similarity is critical for assigning category membership to a novel stimulus. We tested the hypothesis that category membership is initially encoded by the similarity of the activity pattern evoked by a novel stimulus to the patterns from known categories. We provide behavioral and neurophysiological evidence that activity patterns in primary auditory cortex contain sufficient information to explain behavioral categorization of novel speech sounds by rats. Our results suggest that category membership might be encoded by the similarity of the activity pattern evoked by a novel speech sound to the patterns evoked by known sounds. Categorization based on featureless pattern matching may represent a general neural mechanism for ensuring accurate generalization across sensory and cognitive systems.;
Alternative Title: PLOS One
ISSN: 1932-6203
Persistent Link: http://dx.doi.org/10.1371/journal.pone.0078607
http://hdl.handle.net/10735
Terms of Use: ©2013 The Authors. "This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited."

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