大脑微观状态时空动态作为意识的候选内型
Piergiuseppe Liuzzi1, Andrea Mannini2, Bahia Hakiki2
1IRCCS Don Carlo Gnocchi ONLUS, Firenze, Italy; Istituto di BioRobotica, Scuola Superiore Sant'Anna, Pontedera, Italy.
NeuroImage. Clinical
|December 15, 2023
概括
研究人员在严重获得性脑损伤患者中发现了一种新的大脑活动模式,揭示了意识和恢复潜力的新指标. 这种EEG微态分析为长期意识障碍提供了预后见解.
科学领域:
- 神经科学是一个神经科学.
- 临床神经生理学 临床神经生理学
背景情况:
- 意识是一个不断演变的现象学体验.
- 意识的心理活动涉及全球神经元发射的离散的时空模式.
研究的目的:
- 通过使用EEG微态分析,在严重获得性脑损伤 (sABI) 患者中识别新的意识内型.
- 调查微状态特征与神经生理学变化之间的关联.
- 分析长期意识障碍 (pDoC) 患者微状态动态的预后价值.
主要方法:
- 在入住重复康复病房 (IRU) 的sABI患者中使用了高时间分辨率的EEG记录.
- 应用微态分析来研究时间空间大脑动态.
- 检查了与神经生理学变化和患者结果相关的微状态特征,过渡和序列复杂性.
主要成果:
- 面向的微态 (C微态),它们的稳定性,过渡和复杂性表明意识的存在和水平.
- 左右不对称的微态与前后大脑重组和EEG对称性有负相关性.
- 微态复杂性和C地形在不同脑电图背景 (alpha主导,皮质反应,前后梯度) 的患者组之间有显著差异.
- 从左右转向前后微状态的过渡独立地预测了意识恢复,超过了最初的意识水平评估.
结论:
- 全球大脑动态,通过无尺度估计器测量,作为意识存在的指标.
- 这些动态是预测pDoC患者短期康复的候选标记.
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