总回忆:在没有行为时检测自传记忆检索
Matthew Kolisnyk1, Geoffrey Laforge2, Marie-Ève Gagnon3
1Graduate Program in Neuroscience, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Western Institute for Neuroscience, Western University, London, Ontario, Canada.
Neuropsychologia
|March 20, 2025
概括
这项研究使用fMRI研究了患有意识障碍 (DoC) 的患者的自传记忆. 结果表明,一些DoC患者的记忆过程被保存,表明隐藏的意识和认知功能.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 神经学 神经学
背景情况:
- 功能神经成像已经对意识障碍 (DoC) 的理解有了进步.
- 虽然一些DoC患者表现出最小的行为反应,但另一些患者表现出意识的神经迹象.
- DoC患者的自传记忆在很大程度上仍未被探索.
研究的目的:
- 在患有意识障碍的患者中调查自传记忆功能.
- 确定神经活动是否可以区分个人体验与新兴刺激在DOC.
- 探索行为不响应个体的隐藏认知能力.
主要方法:
- 利用功能磁共振成像 (fMRI) 来评估大脑活动.
- 在健康参与者的fMRI数据上训练了一种机器学习分类器,用于自传记忆任务.
- 应用训练有素的分类器来解码fMRI活动在DoC患者查看个性化和控制视频剪辑.
主要成果:
- 分类器准确地区分了个人,对照和DoC患者的新视频条件.
- 在差异化条件下的表现与健康对照的表现相当.
- 患者表现出能够将个人经历与类似的视觉场景区分开来的能力,尽管行为不反应.
结论:
- 在一些有意识障碍的个体中,自传记忆过程可能保持完整.
- 这些发现表明,某些DoC患者的认知功能和内在体验得到了保护.
- 突出了神经成像技术的潜力,揭示了隐藏的意识.
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