注意力可改善人类听觉皮层中的群体水平频率调谐。
Attention improves population-level frequency tuning in human auditory cortex.
作者信息
Okamoto Hidehiko, Stracke Henning, Wolters Carsten H, Schmael Frank, Pantev Christo
机构信息
Institute for Biomagnetism and Biosignalanalysis, University Hospital, University of Muenster, 48149 Muenster, Germany.
出版信息
J Neurosci. 2007 Sep 26;27(39):10383-90. doi: 10.1523/JNEUROSCI.2963-07.2007.
Abstract
Attention improves auditory performance in noisy environments by either enhancing the processing of task-relevant stimuli ("gain"), suppressing task-irrelevant information ("sharpening"), or both. In the present study, we investigated the effect of focused auditory attention on the population-level frequency tuning in human auditory cortex by means of magnetoencephalography. Using complex stimuli consisting of a test tone superimposed on different band-eliminated noises during active listening or distracted listening conditions, we observed that focused auditory attention caused not only gain, but also sharpening of frequency tuning in human auditory cortex as reflected by the N1m auditory evoked response. This combination of gain and sharpening in the auditory cortex may contribute to better auditory performance during focused auditory attention.
摘要
注意力通过增强与任务相关刺激的处理（“增益”）、抑制与任务无关的信息（“锐化”）或两者兼而有之，来改善嘈杂环境中的听觉表现。在本研究中，我们通过脑磁图研究了集中听觉注意力对人类听觉皮层群体水平频率调谐的影响。在主动聆听或分心聆听条件下，使用由叠加在不同带阻噪声上的测试音组成的复杂刺激，我们观察到，如N1m听觉诱发电位所反映的那样，集中听觉注意力不仅会引起增益，还会导致人类听觉皮层频率调谐的锐化。听觉皮层中增益和锐化的这种组合可能有助于在集中听觉注意力期间获得更好的听觉表现。
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