Neural Mechanisms of Interference Control Underlie the Relationship Between Fluid Intelligence and Working Memory Span
Neural Mechanisms of Interference Control Underlie the Relationship Between Fluid Intelligence and Working Memory Span
复制标题
DOI：
10.1037/a0024695
复制
发表时间：
2011-11-01
影响因子：
4.1
通讯作者：
Braver, Todd S.
中科院分区：
文献类型：
--
作者：
Burgess, Gregory C.;Gray, Jeremy R.;Braver, Todd S.
流体智能（GF）和工作记忆（WM）跨度预测了苛刻的认知情况下的成功。最近的研究表明，GF和WM跨度的大部分差异是共享的，这表明了常见的神经机制。这项研究直接研究了GF和WM跨度共享差异的程度，可以通过干扰控制的神经机制来解释。作者在N-BACK WM任务中测量了102名参与者的性能和功能磁共振成像活性，重点是与高干扰诱导试验相关的选择性激活效应。这些试验上的大脑活动与与WM和执行控制有关的核心大脑区域的GF，WM跨度和任务性能相关，包括双侧背外侧前额叶皮层（中间回旋； BA9）和壁皮层皮质（下顶皮层； 7）。与干扰相关的性能和与干扰相关的活动占GF和WM跨度共享方差的很大比例。路径分析表明，干扰控制活动可能会通过也会影响WM跨度的一组常见过程影响GF。这些结果表明，干扰控制机制的个体差异对于理解GF和WM跨度之间的关系很重要。
Fluid intelligence (gF) and working memory (WM) span predict success in demanding cognitive situations. Recent studies show that much of the variance in gF and WM span is shared, suggesting common neural mechanisms. This study provides a direct investigation of the degree to which shared variance in gF and WM span can be explained by neural mechanisms of interference control. The authors measured performance and functional magnetic resonance imaging activity in 102 participants during the n-back WM task, focusing on the selective activation effects associated with high-interference lure trials. Brain activity on these trials was correlated with gF, WM span, and task performance in core brain regions linked to WM and executive control, including bilateral dorsolateral prefrontal cortex (middle frontal gyrus; BA9) and parietal cortex (inferior parietal cortex; BA 40/7). Interference-related performance and interference-related activity accounted for a significant proportion of the shared variance in gF and WM span. Path analyses indicate that interference control activity may affect gF through a common set of processes that also influence WM span. These results suggest that individual differences in interference-control mechanisms are important for understanding the relationship between gF and WM span.