期刊
NEUROSCIENCE
卷 230, 期 -, 页码 114-120出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuroscience.2012.10.068
关键词
subcortical plasticity; inferior colliculus; auditory cortex; bandwidth; tonotopic map; polytrode
资金
- American Hearing Research Foundation
- National Institute of Deafness and Other Communicative Disorders [DC009259]
- Elizabeth Roboz Einstein fellowship
- T.O. Liu Memorial Fund
- NSF Graduate Research Fellowship
Early acoustic experience changes tonal frequency tuning in the inferior colliculus (IC) and the primary auditory cortex. The contributions of IC plasticity to cortical frequency map reorganization are not entirely clear. While most cortical plasticity studies exposed animals to pulsed tones, studies of IC plasticity used either noise or a continuous tone. Here we compared the effects of repeated exposure to single-frequency tone pips on cortical and IC frequency representations in juvenile rats. We found that while tone exposure caused a long-lasting increase in cortical representations of the exposure frequency, changes to IC neurons were limited to a transient narrowing of tuning bandwidth. These results suggest that previously documented cortical frequency map reorganization does not depend on similar changes in the subcortical auditory nuclei. (C) 2012 IBRO. Published by Elsevier Ltd. All rights reserved.
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