Neural correlates of instrumental learning in primary auditory cortex.

Blake DT; Strata F; Churchland AKMerzenich MM

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Neural correlates of instrumental learning in primary auditory cortex.

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In instrumental learning, Thorndike's law of effect states that stimulus-response relations are strengthened if they occur prior to positive reinforcement and weakened if they occur prior to negative reinforcement. In this study, we demonstrate that neural correlates of Thorndike's law may be observed in the primary auditory cortex, A1. Adult owl monkeys learned to discriminate tones higher than a standard frequency. Responses recorded from implanted microelectrodes initially exhibited broad spectral selectivity over a four-to-five octave range. With training, frequency discrimination thresholds changed from close to one octave to about 112 octave. Physiological recordings during the week in which the monkey came under behavioral control signaled by a drop in measured threshold had stronger responses to all frequencies. During the same week, A1 neural responses to target stimuli increased relative to standard and nontarget stimuli. This emergent difference in responsiveness persisted throughout the subsequent weeks of behavioral training. These data suggest that behavioral responses to stimuli modulate responsiveness in primary cortical areas.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2002年第15期|10114-10119|共6页
作者
Blake DT; Strata F; Churchland AKMerzenich MM;
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作者单位

Coleman Laboratory and Keck Center for Integrative Neuroscience, Department of Otolaryngology, University of California, San Francisco, CA 94143-0732.;

hysiology.rwth-aachen.de;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
week; Learning; Auditory Cortex; A1; 学习; 听觉皮质;

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Neural correlates of instrumental learning in primary auditory cortex.

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