人的背部前带带皮层神经元介导着正在进行的行为适应
Sameer A Sheth1, Matthew K Mian, Shaun R Patel
1Nayef Al-Rodhan Laboratories, Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
脊前环状皮层 (dACC) 神经元活动预测认知负载,影响行为. 这个大脑区域优化对不断变化的环境需求的反应,增强认知控制.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 人类认知能力 人类认知能力
背景情况:
- 认知控制对于适应不断变化的环境至关重要.
- 脊前环状皮层 (dACC) 参与认知控制,但其精确的机制尚不清楚.
- 之前的假设表明dACC参与决策,冲突监测和任务难度预测.
研究的目的:
- 研究dACC个体神经元在编码认知负载中的作用.
- 阐明底层神经机制的行为适应变化的认知需求.
- 确定dACC对于冲突适应 (格拉顿效应) 的必要性.
主要方法:
- 在人类的功能神经成像 (fMRI).
- 从人类的dACC中单个神经元的记录.
- 行为实验测量反应时间和准确性.
- 在参与者的子集中,dACC的外科切除.
主要成果:
- 单个dACC神经元发射率与当前和最近的认知负载相关.
- 过去的认知负载会影响当前的dACC活动,导致行为适应 (格拉顿效应).
- 这种冲突适应在dACC被废除后被废除.
结论:
- 该dACC提供了不断更新的认知需求预测.
- 这种预测优化了基于需求稳定的效率或准确性的未来行为反应.
- 根据不断变化的认知需求,DACC对于适应性行为调整至关重要.
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