没有视力的采样:先天盲人个体的听觉表现波动
Eva Khasis1, Daniele Re1, Flor Kusnir1
1The Hebrew University of Jerusalem.
Journal of cognitive neuroscience
|April 28, 2025
概括
注意采样,感知中的节奏波动,在听力中进行了调查. 出生失明的个体显示了8-10 Hz的听觉采样,这表明大脑的可塑性增强了这个域一般机制.
科学领域:
- 认知神经科学 认知神经科学
- 听觉感知是一种听觉感知.
- 注意力机制注意力机制
背景情况:
- 在视觉中,注意力以节奏波动 (∼8 Hz),这种现象被称为注意力抽样.
- 在试听中类似的节奏采样的证据是相互矛盾的.
- 视觉体验在听觉采样中的作用尚不清楚.
研究的目的:
- 调查注意力抽样是否是一种延伸到听力领域的通用机制.
- 检查视觉体验对听觉采样的影响.
- 为了比较视力,视力蒙眼,获得失明和先天失明的个体之间的听觉采样.
主要方法:
- 参与者在白噪音中检测到听觉目标 (强度下降).
- 对不同视觉体验组的节奏波动分析了行为表现.
- 这些组包括:有视力的人 (n=21),有视力的人蒙着眼睛 (n=26),获得失明 (n=13) 和先天性失明 (n=12).
主要成果:
- 出生失明的个体表现出8-10 Hz的听觉采样.
- 视力和获得失明组显示了2 Hz的波动,可能与时间期望有关.
- 在先天失明组中,缺少三角波段 (2 Hz) 采样.
结论:
- 在先天性失明中,大脑的可塑性可能会促进听觉注意力抽样.
- 缺乏早期视觉输入可能会招募"视觉"大脑区域进行听觉处理,从而实现节奏采样.
- 听觉采样可能存在于有视力的个体中,但可能会被视觉输入掩盖或以不同的频率发生.
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