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

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

Research output: Contribution to journalArticle


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.

Original languageEnglish (US)
Pages (from-to)11070-11075
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number19
StatePublished - Sep 16 2003


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