脑卒中后认知障碍中的网络动态:从有效的连接性分析中获得的见解
Zhao Ruan1, Xiaoli Zhou1, Bo Rao1
1Department of Radiology, Zhongnan Hospital of Wuhan University, Wuchang, Wuhan, Hubei, 430071, China.
Brain imaging and behavior
|January 28, 2025
概括
脑卒中后认知障碍 (PSCI) 显示大脑网络之间的有效连接 (EC) 增加,特别是涉及后带带皮质和右侧前额皮质. 这些EC变化与认知缺陷相关.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 医疗成像医学成像
背景情况:
- 脑卒中后认知障碍 (PSCI) 是影响生活质量的重大挑战.
- 了解PSCI的神经机制对于开发有效干预措施至关重要.
研究的目的:
- 研究PSCI患者的大脑网络内部和大脑网络之间有效连接 (EC) 的变化.
- 为了将改变的EC与认知表现和损伤位置相关联.
主要方法:
- 利用41名PSCI患者和41名健康对照者的静止状态fMRI数据的光谱动态因果建模 (spDCM).
- 在默认模式下比较EC,执行控制,背部注意力和突出网络.
- 与认知测试分数相关的EC变化,并根据病变位置进行了子组分析.
主要成果:
- 患有PSCI的患者表现出明显增加的EC,从后侧带带皮层 (PCC) 到左侧和右侧脊侧前额皮层 (L_DLPFC,R_DLPFC),以及从右侧胰岛到R_DLPFC.
- 增加的EC与认知得分有负相关性.
- 亚组分析显示,PSCI患者左前循环病变的执行控制增强.
结论:
- 调查结果表明,增加网络间的EC,特别是在三重网络模型中,有助于PSCI病理生理学.
- PCC和R_DLPFC涉及到PSCI的基础神经机制.
- 这项研究强调了网络层面分析对于理解PSCI和开发向治疗的重要性.
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