更努力地尝试:认知努力如何在工作记忆期间塑造神经表征
Sarah L Master1, Shanshan Li1,2, Clayton E Curtis3,4
1Department of Psychology, New York University, New York, New York 10003.
概括
增加的认知力度通过调节神经活动来提高工作记忆 (WM) 性能. 来自前额叶皮层的大脑信号会影响视觉皮层的表现,提高记忆的准确性.
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
- 认知力度 认知力度 认知力度
背景情况:
- 动机因素影响认知任务的表现,但潜在的神经机制尚不清楚.
- 众所周知,认知努力可以提高表现,但它的神经基础仍然难以捉摸.
研究的目的:
- 研究认知努力如何影响工作记忆 (WM) 的神经表示.
- 探索神经机制连接的努力,前额叶皮层 (PFC) 活动,和视觉皮层表示在WM任务.
主要方法:
- 功能磁共振成像 (fMRI) 用于监测大脑活动.
- 参与者执行了一个工作记忆任务,难度不同 (容易与难),以操纵认知力度.
- 分析了行为指标 (学生大小,响应时间) 和神经活动模式.
主要成果:
- 更艰难的试验,表明更高的努力,显示了增加的瞳孔大小和更慢的反应时间.
- 在高强力试验期间,在前额叶皮层 (PFC) 观察到持续的活动.
- 虽然PFC活动并没有直接解码记忆内容,但视觉皮质中的活动显示在艰难的试验中增强了对记忆目标的解码.
- 额叶皮层活动幅度预测视觉皮层解码精度,将努力与记忆效率联系起来.
结论:
- 由前额叶皮层活动发出信号的认知努力,提高了视觉皮层工作记忆表现的质量.
- 与努力相关的反信号塑造了神经群体的活动,提高了记忆精度和任务性能.
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