选择性注意力塑造了复杂的听觉场景的神经表现:对象身份和场景构成的角色
Patrik Wikman1,2,3, Ilkka Muukkonen4, Jaakko Kauramäki4,5,6
1Department of Psychology, University of Helsinki, Helsinki 00014, Finland patrik.wikman@helsinki.fi.
概括
在复杂的听觉场景中对声音的选择性注意力增强了听觉皮层 (AC) 中的神经表现. 注意力为最佳场景分析动态优先考虑特征,适应上下文和对象类型.
科学领域:
- 神经科学是一个神经科学.
- 听觉感知是一种听觉感知.
- 认知心理学 认知心理学
背景情况:
- 日常的听觉环境是复杂的,重叠的声音需要选择性的注意力,以将相关的听觉对象与背景噪音隔离.
- 听觉皮层 (AC) 在处理复杂的声音场景中起着至关重要的作用,但选择性注意力如何在AC内塑造神经表征尚未完全理解.
研究的目的:
- 研究选择性注意力如何影响听觉皮层中复杂的声音场景的神经表现.
- 检查注意力是否调节神经收益或影响场景分解和基于上下文和对象类型的分析.
主要方法:
- 功能性磁共振成像 (fMRI) 用于记录参与者 (N=20) 听复杂的声音场景时的大脑活动.
- 场景包括三个重叠的声音,用不同类别的物体 (语音,动物,乐器) 或同一类别的物体构成.
- 参与者在每个场景中关注一个指定的对象,同时使用空间模式分析分析大脑活动模式.
主要成果:
- 听到语音的声音在侧面的AC子场中增强了活动,而听到动物或仪器的声音则调节了中间的AC子场.
- 空间模式分析显示,受访对象主导了AC激活模式,效果因对象类型和场景组成而异.
- 在不同类别的场景中,注意力效应由类别级处理主导;在类别相似的场景中,注意力转移到示例级处理.
结论:
- 选择性注意力在给定的听觉环境中动态优先考虑提供最大对比度的特征.
- 上下注意力信号不仅调节神经增益,而且还影响听觉场景分解和流分离以依赖上下文的方式.
- 这些发现支持了在复杂环境中注意力适应性塑造听觉处理以进行有效的场景分析的模型.
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