精神分裂症中词语关系的均质化:皮层语义表示的拓分析
Ryusuke Hayashi1, Shizuo Kaji2, Yukiko Matsumoto3,4,5
1Human Informatics and Interaction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan.
Psychiatry and clinical neurosciences
|August 28, 2024
概括
精神分裂症患者在大脑中表现出改变的词概念连接,影响抽象. 功能性MRI和拓分析揭示了与健康个体相比,不同的语义网络结构.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 精神病学是一个精神病学.
背景情况:
- 精神分裂症的特点是思想混乱,具体性和过度包容.
- 这些抽象缺陷的神经生物学基础仍然不清楚.
- 了解精神分裂症中的概念表征至关重要.
研究的目的:
- 通过功能磁共振成像 (fMRI) 来调查精神分裂症中的异常概念联系.
- 检查不同抽象级别的脑活动中词语概念是如何表示的.
- 阐明抽象缺陷背后的精神病理.
主要方法:
- 从14名精神分裂症患者和17名健康对照组中收集的fMRI数据.
- 一种编码建模方法,用于将单词概念表示为大脑活动.
- 持久的同类学 (PH) 分析了跨抽象级别的词汇表示的拓结构.
主要成果:
- 精神分裂症患者在抽象水平上表现出比对照组更同质的词汇关系.
- 与对照组相比,精神分裂症的拓结构转向了随机网络.
- PH方法有效地区分了群体之间的语义表示.
结论:
- 研究结果通过揭示改变的概念连接性来解释精神分裂症中的抽象缺陷.
- 减少细粒度的上下文联系和模糊的粗体边界有助于症状.
- 同位素概念连接是精神分裂症的具体性和过度包含的基础.
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