2011 Fiscal Year Final Research Report
Mechanisms of speech sound discrimination learning in the rat auditory and association cortices
| Project/Area Number |
21500309
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Neuroscience in general
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| Research Institution | Teikyo University |
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Principal Investigator |
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| Research Collaborator |
OGAWA Go 帝京大学, 大学院生
NISHIDA Yoko 東都医療大学, ヒューマンケア学部, 講師
HIGASHIDE Keishi 芝浦工業大学, 大学院・理工学研究科, 修士課程
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| Project Period (FY) |
2009 – 2011
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| Keywords | 母音 / ホルマント / 摩擦子音 / 弁別学習 / 機能的結合 / 一次聴覚野 / 前聴覚野 / ラット |
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| Research Abstract |
Flavoprotein autofluorescence imaging showed that synthetic formants and vowels evoked prominent responses in the anterior(AAF) and dorsal(DAF) auditory field in addition to the primary auditory cortex(AI), while fricative consonants evoked responses in the AI, DAF and ventral auditory field(VAF). Electrical stimulation to AAF elicited fluorescence responses in DAF while that to AI evoked responses in DAF and VAF. AAF responded markedly to formants with fast change of waveform envelopes, while AI responses depended on spectrum of sounds. These findings suggest that there are dual pathways for speech sound discrimination.
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