人类大脑侧面化的分子和细胞支柱
Loïc Labache1,2, Sidhant Chopra3,4, Xi-Han Zhang 张喜寒2
1Department of Psychiatry, Brain Health Institute, Rutgers University, Piscataway, US-NJ 08854.
bioRxiv : the preprint server for biology
|December 3, 2025
概括
人类大脑的横向化,对于语言和注意力至关重要,具有潜在的分子和细胞差异. 这项研究揭示了支持这些认知功能的特定神经化学和细胞不对称性.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 认知科学 认知科学
背景情况:
- 人类大脑的组织具有半球专业化特征,左侧主导语言,右侧主导视觉空间注意力.
- 虽然大脑横向化存在于其他物种中,但人类表现出明显的偏差.
- 这些大脑不对称的分子和细胞基础尚未得到充分理解.
研究的目的:
- 为了识别人类大脑皮层横向化背后的关键神经化学和细胞不对称性.
- 研究左半球语言主导和右半球视觉空间注意力主导的分子和细胞基质.
主要方法:
- 采用了多模式方法,结合了体内功能性MRI和PET成像.
- 综合性死后转录和细胞数据分析.
- 研究了神经递质受体密度,线粒体分布和细胞群 (微质,刺激神经元) 的横向梯度.
主要成果:
- 确定了神经递质受体密度沿单氨基-胆氨基轴的横向梯度.
- 观察到线粒体分布的不对称性以及微质细胞和谷氨酸刺激神经元的空间流行.
- 划出了两个不同的皮质集群:语言的左侧网络和视觉空间注意力的右侧网络.
结论:
- 证明了人类大脑中横向认知的生物嵌入基质.
- 这些发现提供了对大脑不对称性的进化基础的见解.
- 结果可能有助于理解与颠覆横向化相关的神经精神疾病.
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