通过可感知和不可感知的节奏光刺激来训练大脑振荡
Katharina Lingelbach1,2, Alexander M Dreyer2, Isabel Schöllhorn3,4
1Fraunhofer Institute for Industrial Engineering, Human-Technology Interaction, Stuttgart, Germany.
Frontiers in neuroergonomics
|January 18, 2024
概括
节奏式光刺激可靠地唤起稳定状态视觉唤起潜能 (SSVEPs),即使是不可察觉的,并且有间接的注意力. 这种非侵入性脑电脑接口方法对自然主义应用有很大的前景.
科学领域:
- 神经科学是一个神经科学.
- 生物医学工程 生物医学工程
- 人与计算机的交互
背景情况:
- 稳态视觉唤起潜能 (SSVEP) 显示了使用节奏光刺激的脑电脑接口 (BCI) 的潜力.
- 非侵入性的节奏光刺激可以引发大脑振荡,无形的协议可以减少用户的不适.
- 调查可感知与不可感知刺激和注意力效应对优化BCI应用至关重要.
研究的目的:
- 评估可感知和不可感知节奏光刺激对唤起SSVEPs的有效性.
- 评估公开和隐蔽关注对SSVEP检测和功能连接的影响.
- 确定非侵入性的SSVEP协议在自然的BCI应用中的潜力.
主要方法:
- 使用LED驱动的频率调制信号,在10 Hz的稳定状态视觉唤起潜力 (SSVEPs) 得到.
- 刺激强度在个体感知度值以下或以上调节.
- 脑电图 (EEG) 测量了SSVEP,分析了在公开和隐藏的注意条件下信号噪声比 (SNR) 和功能连接.
主要成果:
- 可靠的10 Hz SSVEPs被检测到可感知和不可感知刺激,跨越公开和隐藏的注意力条件.
- 在刺激或注意条件之间没有观察到SNR或SSVEP振幅的显著差异.
- 在所有测试条件下, occipito-frontal-central区域的功能连接保持一致.
结论:
- 强大的SSVEPs可以使用低于感知值的非侵入性节奏刺激可靠地唤起.
- 在没有直接固定在刺激源上的情况下,可以实现有效的SSVEP引入.
- 这些发现突出了安全,自然主义的节奏刺激对大脑振荡带动的潜力.
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