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在婴儿的大脑中,声音持续时间处理的早期成熟
Silvia Polver1, Gábor P Háden2,3, Hermann Bulf1,4
1Department of Psychology, University of Milano-Bicocca, Milan, Italy.
Scientific reports
|June 24, 2023
概括
在婴儿中,对声音持续时间的早期听觉处理是发育的关键. 研究人员绘制了4个月和9个月大的儿童的大脑活动图,揭示了听觉区域的发育变化.
科学领域:
- 发育神经科学的发展神经科学.
- 听觉感知研究 听觉感知研究
- 婴儿认知发展婴儿的认知发展.
背景情况:
- 在早期发育过程中,声音持续时间处理对听觉感知,物体识别和语言获取至关重要.
- 适合年龄的结构解剖模板的进步使电脑电图 (EEG) 源活动的更可靠的重建成为可能.
研究的目的:
- 在4个月和9个月大的婴儿中,重建和分析与事件相关的潜在 (ERP) 波形的神经生成器,这些波形对声音持续时间敏感.
- 为了研究4至9个月龄之间的声音持续时间的听觉处理中的发育变化.
- 确认解剖学模板对于研究发育人口的有用性.
主要方法:
- 使用适合年龄的结构解剖模板来重建EEG源活动.
- 呈现了4个月和9个月大的婴儿,在随机顺序下发出短200毫秒和长300毫秒的声音.
- 分析了根据声音持续时间调节的两个时间上不同的ERP波形.
主要成果:
- 在婴儿中确定了两种对声音持续时间敏感的ERP波形.
- 这些波形的生成器主要定位在初级和二级听觉区域以及与语言相关的区域.
- 在4个月到9个月之间观察到显著的发育变化,基础生成器的变化比头皮记录的ERP更为细微.
结论:
- 该研究证实了使用解剖学模板用于发育性EEG研究的可行性.
- 声音持续时间的神经处理中的显著发育变化发生在4至9个月之间.
- 音频持续时间的听觉处理从婴儿时期就涉及关键的听觉和语言相关的大脑区域.
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