腹腔注意网络介导注意重定向到跨模态期望违规:来自EEG和fMRI的证据
Soukhin Das1,2, Sreenivasan Meyyappan1, Evelijne M Bekker1
1Center for Mind and Brain, University of California Davis, CA, USA.
概括
违反感官期望的行为迅速激发腹腔注意网络 (VAN) 来重新定位注意力. 这个大脑网络协调传感输入和自上而下的控制,以适应对意外刺激的适应性反应.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 感官感知是一种感官感知.
背景情况:
- 感官期望,由背景和经验驱动,塑造注意力.
- 预测编码模型提出了预期和注意力之间的相互作用,但机制仍在争论中.
- 假设腹腔注意网络 (VAN) 在预期违规时有助于注意力重定向.
研究的目的:
- 调查腹腔注意网络 (VAN) 在跨模态期望违规中的作用.
- 检查当感官期望未得到满足时,大脑如何重新定位注意力.
主要方法:
- 使用66名人类参与者交叉模式的听觉视觉暗示范式.
- 集成的脑电图 (EEG) 和功能磁共振成像 (fMRI) 用于神经数据采集.
- 分析了与事件相关的潜力 (ERP),源本地化和功能连接.
主要成果:
- 行为数据证实了对预期目标的反应更快.
- 脑电图揭示了意外的听觉和视觉刺激的早期ERP差异 (∼100毫秒).
- fMRI和源定位确定了右侧的VAN激活,与感官区域的连接性增加 (听觉的STG,视觉的FG).
结论:
- 违反预期的行为会让VAN重新调整注意力,并解决感官冲突.
- 汽车网络通过将自上而下的控制与自下而上的感官处理相结合,促进了适应性反应.
- 这些发现有助于更好地理解预测处理,多感官集成和注意力,并对相关疾病产生影响.
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