在虚拟环境中进行系统的视听训练后,对微观结构和功能连接性大脑变化的多模态MRI分析
Kholoud Alwashmi1, Fiona Rowe2, Georg Meyer3
1Faculty of Health and Life Sciences, University of Liverpool, United Kingdom; Department of Radiology, Princess Nourah bint Abdulrahman University, Saudi Arabia.
NeuroImage
|December 28, 2024
概括
虚拟现实训练可以增强大脑的连接性. 学习引起的白质道的变化与性能改善相关,证明了多感官集成对认知增强和康复的力量.
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:
- 学习新任务会引发快速的微观结构性大脑变化.
- 这些变化涉及多个由白质 (WM) 连接的脑区域.
- 行为性能改善可能是神经网络中微观结构,功能和连接性变化的结果.
研究的目的:
- 调查学习诱导的微观结构变化在WM路径和功能连接之间的联系.
- 通过扩散张力成像 (DTI) 和扩散曲解成像 (DKI) 来量化这些变化.
- 探索虚拟现实 (VR) 对多感官集成的潜力及其对大脑可塑性的影响.
主要方法:
- 20名健康的参与者接受了一个月的系统视听 (AV) VR培训.
- 扩散张力成像 (DTI) 和扩散形成像 (DKI) 用于分析大脑微观结构的变化.
- 用重复测量ANOVA和功能连接 (FC) 分析来评估WM通道和大脑区域的变化.
主要成果:
- 训练后观察到SLF II中平均扩散率 (MD) 的下降和光学辐射中微分异型度 (FA) 的增加,并在随访中持续存在.
- 减少的MD显著与行为性能增长相关.
- 初级视觉和听觉皮层之间明显存在增强的功能连接相关性,这得到了相关大脑区域和WM通道的DKI发现的支持.
结论:
- 多模式成像分析 (DTI和DKI) 提供了脑网络变化的补充证据.
- 微观结构的适应 WM 轨道与功能连接性的改变有关.
- 沉浸式虚拟现实培训促进了多感官集成,为学习和康复策略提供了潜力.
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