复杂的多源声音在新生小鼠大脑中诱导了比单源声音更大的神经退行,而不是单源声音
İskender Samet Daltaban1, Mehmet Dumlu Aydın2, Eylem Eren Eyüpoğlu3
1Department of Neurosurgery, Alife Hospital, Ankara, Türkiye.
Frontiers in systems neuroscience
|February 13, 2026
概括
复杂的多源噪声会在新生小鼠中引起更严重的脑损伤,而不是同等强度的单源噪声. 这表明,噪音暴露指南应该考虑声学复杂性,以保护弱势群体.
科学领域:
- 神经科学是一个神经科学.
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
背景情况:
- 过度暴露于噪音是一个公认的环境健康风险,与神经损伤和认知缺陷有关.
- 来自多个来源的复杂声波形式与同等强度的单源噪声对大脑损伤的影响尚不清楚.
研究的目的:
- 为了研究通过单与多扬声器设置呈现的相同音乐对新生小鼠发育中的大脑的差异效应.
- 为了比较简单 (单源) 与复杂 (多源) 声波形式在同等强度的神经毒理学结果.
主要方法:
- 新生的斯普拉格-道利大鼠在30天内从一个或四个扬声器中听到音乐 (~85dB SPL).
- 组织学检查,对神经元密度的无偏见立体学和免疫组织化学 (NSE,GFAP) 用于评估脑损伤.
- 道测试确定了叶,杏仁体和海马体中的亡神经元密度.
主要成果:
- 与单个扬声器暴露相比,多扬声器暴露导致海马和杏仁核中细胞缩神经元密度显著增加.
- 组织学分析显示,在多语音组中,脑损伤更严重,包括下关节出血和微血管出血.
- 两种噪音暴露都增加了神经元的亡,但多语音组显示出明显明显的增加和广泛的神经元损失和星质损伤的迹象.
结论:
- 来自多个来源的复杂声波形式在发育中的大脑中放大噪声诱导的神经退行比同等强度的单一源噪声更多.
- 在噪音暴露指南中,除了强度和持续时间外,应考虑声学复杂性和源配置.
- 调查结果强调,需要加强对婴儿和儿童等弱势群体的高强度多源噪声环境的保护.
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