努力:认知努力如何在工作记忆过程中塑造神经表征
Sarah L Master1, Shanshan Li1,2, Clayton E Curtis1,3
1Department of Psychology, New York University.
bioRxiv : the preprint server for biology
|December 18, 2023
概括
激励因素可以增强工作记忆 (WM) 中的认知努力. 在苛刻的任务中,额叶皮层活动的增加改善了视觉皮层的记忆表现质量.
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
- 认知神经科学 认知神经科学
背景情况:
- 动机如何影响工作记忆 (WM) 等认知功能的神经基础尚未得到充分理解.
- 研究认知努力在调节WM表现中的作用对于理解大脑功能至关重要.
研究的目的:
- 阐明神经机制,通过认知努力调节工作记忆性能.
- 检查前额叶皮质活动,视觉皮质表现和在艰苦的WM任务期间的行为结果之间的关系.
主要方法:
- 用功能磁共振成像 (fMRI) 来测量大脑活动.
- 参与者执行了具有不同难度的工作记忆任务 (艰难与容易的试验),以操纵认知努力.
- 行为测量包括瞳孔大小和反应时间;神经活动被分析为持续活动和表示解码.
主要成果:
- 行为数据表明,在艰难的试验中,认知力度增加,以较大的瞳孔尺寸和较慢的反应时间为证.
- 在高强力试验期间,fMRI显示前额叶皮质的持续活动增强.
- 解码分析显示,在艰难的试验中,视觉皮层的位置表示精度得到了改善,前额叶皮层活动预测了这种改善.
结论:
- 额叶皮层持续的活动可能作为与努力相关的反信号.
- 这种信号似乎提高了视觉皮层内工作记忆表示的质量.
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