Response patterns of single neurons in higher auditory cortex to artificial and natural sounds
Project/Area Number |
25350999
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Brain biometrics
|
Research Institution | University of Yamanashi |
Principal Investigator |
CHIMOTO Sohei 山梨大学, 総合研究部, 助教 (80324185)
|
Project Period (FY) |
2013-04-01 – 2017-03-31
|
Project Status |
Completed (Fiscal Year 2016)
|
Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
|
Keywords | 純音 / ランプ音 / ダンプ音 / 大脳聴覚野 / 単一細胞記録 / 非対称知覚 / 振幅変調音 / 一次聴覚野 / 高次聴覚野 / 音色知覚 / 知覚の非対称性 / 単一ニューロン活動 / 位相スペクトル / 基本周波数 / 一過性応答 / 持続性応答 / 多種類の音刺激 / 音圧変化の符号化 |
Outline of Final Research Achievements |
In many acoustic circumstances, waveform of speech and musical sound are asymmetric in time. The sound envelopes play an important role in such sound perceptions. However, little is known about the neural activities in auditory cortex during asymmetrical stimuli. To examine neural mechanisms related to the perceptual asymmetry, we examined response patterns of the auditory cortex neurons during ramped and damped stimuli in awake animals. We found two types of neurons in the primary auditory cortex (A1): edge cells sensitive to the quick attack and quick decay, while slope cells sensitive to the slow attack and slow decay. The majority of A1 neurons are tuned to the velocity (slow or quick). Persistence of excitation after ramped sounds is longer than that after damped sounds caused mainly from edge cells. This physiologically supports psychological reports that persistence of perception is longer after ramped sounds than damped sounds.
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Report
(5 results)
Research Products
(8 results)