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运动到感官转换的损伤介于听觉幻觉
Fuyin Yang1,2,3, Hao Zhu2,4, Xinyi Cao1
1Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
功能受损的复制 (EC) 和附带放电 (CD) 信号破坏了代理感,导致精神分裂症患者的听觉语言幻觉 (AVH). 特定的运动至感官处理缺陷导致这些积极症状.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 认知科学 认知科学
背景情况:
- 代理感依赖于监控运动指令及其感官后果.
- 效应副本 (EC) 或附带放电 (CD) 假设表明运动信号预测感官反以抑制自我产生的感觉.
- 这种预测机制的功能障碍与幻觉有关,但障碍的确切性质尚不清楚.
研究的目的:
- 调查听力语言幻觉 (AVHs) 患者在运动到感官转换过程中,随随性放电 (CD) 和效应副本 (EC) 信号的选择性损伤.
- 区分一般与特定运动准备在精神分裂症听觉响应调制中的作用.
- 开发一个计算模型来量化AVHs的运动到感官转换缺陷.
主要方法:
- 电脑脑图 (EEG) 实验使用延迟发音模式在精神分裂症患者 (AVHs) 和没有 (非AVHs) 听觉语言幻觉.
- 评估了在一般运动准备过程中听觉反应的抑制 (在不了解内容的情况下说话) 和在特定运动准备过程中增强 (准备特定音节).
- 开发了一个模拟"破碎"CD和"噪音"EC的计算模型,其中包含虚拟损伤和敏感的听力皮层,以适应实证数据.
主要成果:
- 一般运动准备在AVH和非AVH组中未能抑制听觉反应,这表明缺少抑制性CD功能.
- 特定的运动准备在非AVH中增强了对准备的音节的听觉反应,但在AVH中增强了对未准备的音节的反应,与健康个体不同.
- 计算模型成功地复制了经验数据,量化了AVHs中运动到感官转换的明显障碍,特别是"破碎"CD和"噪音"EC.
结论:
- 精神分裂症的听觉语言幻觉是由受损的冠状分泌 (CD) 抑制和不精确的效能复制 (EC) 增强的组合引起的.
- 这些"破碎"的CD和"杂"的EC信号导致错误的监控和不准确的内部审计表示生成.
- 运动到感官转换的功能细粒度的特定缺陷在精神障碍,如精神分裂症中介导了代理异常的积极症状.
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