在视觉工作记忆期间,全大脑人类振荡局部场潜在活动.
Balbir Singh1, Zhengyang Wang2, Leen M Madiah1
1Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
iScience
|February 21, 2024
概括
局部场电位 (LFP) 振荡揭示了在工作记忆任务期间大脑广泛激活. 不同的大脑区域在马和β频率中显示出不同的模式,突出显示了特定区域在认知过程中的作用.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 电子生理学 电子生理学
背景情况:
- 在局部场潜在 (LFP) 中的振荡活动被认为是认知功能的潜在神经相关.
- 了解这些振荡在不同大脑区域和任务中的特定作用,对于破译认知机制至关重要.
研究的目的:
- 研究如何在人类的各种大脑区域和任务中区分局域潜力 (LFP) 振荡活动.
- 识别与视觉和空间工作记忆相关的特定区域的神经特征.
主要方法:
- 在15名成年参与者中,从内深度电极记录了局部场电位 (LFP).
- 参与者执行视觉空间和形状工作记忆任务.
- 在不同频段 (例如高马,β) 的不同脑区分析了振荡功率.
主要成果:
- 刺激呈现引起了广泛的,在多个皮层和皮下区域的宽带激活,包括,,,,岛屿,前额叶皮层,杏仁体和海马体.
- 在视觉刺激呈现期间,尾皮层在高马频率范围 (100-150 Hz) 中表现出最大的功率.
- 在延迟期间,在不同大脑区域观察到一个一致的β频率 (16-40 Hz) 调制模式,其特征是功率下降和随后的反弹.
结论:
- 在工作记忆任务期间,振荡活动在广泛的神经网络中普遍存在.
- 独特的特定区域的振荡特征,特别是玛和β频率,与视觉工作记忆过程有关.
- 这些发现有助于理解认知功能的神经基础和大脑网络动态.
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