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Reward-dependent plasticity in the primary auditory cortex of adult monkeys trained to discriminate temporally modulated signals

Year: 2003

Type: article

Abstract: Adult owl monkeys were trained to detect an increase in the envelope frequency of a sinusoidally modulated 1-kHz tone. Detection was positively correlated with the magnitude of the change in the envelope frequency. Surprisingly, neuronal responses recorded in the primary auditory cortex of trained monkeys were globally suppressed by the modulated tone. However, the contrast in neuronal responsiveness to small increases versus large increases in envelope frequencies was actually enhanced in the trained animals. The results suggest behaviorally contingent inhibitory and excitatory processes that are modulated by the probability that a particular signal predicts a reward.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.1334187100

Authors: Ralph E. Beitel, Christoph E. Schreiner, Steven W. Cheung, Xiaoqin Wang, Michael M. Merzenich

Institutions: Johns Hopkins University, University of California, San Francisco

Language: English

Topic: Neuroscience and Music Perception

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: green

Funders: National Institute on Deafness and Other Communication Disorders, National Institute of Neurological Disorders and Stroke