由直接电刺激引起的视觉感觉的电生理学特征
Yan-Yan Li1,2, Bo Zhang3, Jing Wang4
1State Key Laboratory of Cognitive Science and Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, China.
Neuroscience bulletin
|July 23, 2025
概括
电脑刺激可以引起视觉感觉,但它们是不稳定的. 这项研究发现,与这些不稳定的视觉感觉有关的大脑活动模式发生了变化,特别是功率光谱斜率平坦化和综合信息减少.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 电力生理学 电力生理学
背景情况:
- 人类皮层的直接电刺激可以唤起主观的视觉感觉.
- 这些感觉的不稳定性表明了复杂的潜在神经机制.
- 在刺激部位之外的分布式网络活动可能发挥关键作用.
研究的目的:
- 研究由皮层刺激引起的不稳定的主观视觉感觉背后的电生理机制.
- 为了确定与视觉感觉的存在或不存在相关的特定大脑网络变化.
主要方法:
- 招募了69名接受或其他神经疾病侵入性电刺激的患者.
- 在刺激过程中记录了内脑电图 (iEEG) 数据,在刺激过程中引起视觉感觉,并在非感觉期间记录数据.
- 分析了功率光谱斜率和集成信息,并使用最小信息分区进行了网络分析.
主要成果:
- 与非感觉条件相比,在引起的视觉感觉期间,在分布式的大脑区域观察到显著平坦的功率光谱倾斜.
- 在视觉感觉期间发现综合信息减少.
- 重新配置的网络相互作用主要涉及下额叶皮质,后部上角和时结.
- 在较低的额头回形中平整的功率光谱倾斜与集成信息相关.
结论:
- 改变的电生理学特征,包括平整的功率光谱斜率和减少的集成信息,为主观视觉感觉的神经基础提供了洞察力.
- 涉及特定皮质区域的网络重新配置与这些感觉的产生有关.
- 这些发现有助于理解意识和感知的神经动态.
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