在背部ACC的认知努力的相对主观价值的通用编码
Jennifer L Crawford1,2, Rachel E Brough3, Sarah A Eisenstein4,5
1Department of Psychological and Brain Sciences, Washington University in St. Louis, St. Louis, Missouri 63130 jlcrawford@brandeis.edu.
脊前环状皮质 (dACC) 在决定是否施加认知力度方面发挥着关键作用. 它有助于权衡成本和收益,当成本似乎太高时,引导选择远离努力.
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
- 决策科学 决策科学 决策科学
背景情况:
- 认知努力的决策会影响生活结果,但基本的神经机制尚不清楚.
- 了解这些机制对于解释人类的成本效益决策至关重要.
- 以前的研究还没有完全阐明大脑区域参与评价认知努力.
研究的目的:
- 研究基于认知努力的决策的神经机制.
- 为了量化认知努力的神经编码,相对于奖励结果的需求.
- 为了确定参与本成本效益分析的特定大脑区域.
主要方法:
- 使用了认知努力折扣范式 (Cog-ED).
- 在决策任务中使用功能磁共振成像 (fMRI).
- 在工作记忆和语音理解领域评估神经活动.
主要成果:
- 背前环状皮层 (dACC) 的激活跟踪了低功耗选项的主观值.
- 当低精力,低回报选项被偏好于高精力,高回报选项时,dACC活动最高.
- dACC活动是域一般的,跨任务相关,并预测了后续的选择.
结论:
- 在认知努力决策中,dACC发挥着核心和选择性的作用.
- dACC活动反映了努力成本与回报的域一般估值比较机制.
- 这种机制使个人偏离认知努力,当感知成本超过收益时.
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