The capacity constraint in the prefrontal and parietal regions for coordinating dual arithmetic tasks

减法 对偶(语法数字) 任务(项目管理) 功能磁共振成像 工作记忆 算术 认知心理学 后顶叶皮质 心理学 听力学 神经科学 数学 认知 医学 艺术 管理 文学类 经济
作者
Bo-Cheng Kuo,Yei-Yu Yeh,Der-Yow Chen,Keng‐Chen Liang,Jyh-Horng Chen
出处
期刊:Brain Research [Elsevier BV]
卷期号:1199: 100-110 被引量:14
标识
DOI:10.1016/j.brainres.2007.12.070
摘要

Using a dual-serial-arithmetic paradigm, we examined whether a capacity limitation constrains the neural activation that underlies dual-task performance. Six conditions were run in the experiment (the baseline, single-addition, single-subtraction, dual-addition, dual-subtraction, and the dual-operation condition). In the baseline condition, participants were asked to remember the initial pair of numbers and ignore subsequent stimuli. In the single-addition and single-subtraction conditions, participants had to calculate a running total over a series of stimuli. In the dual-addition and dual-subtraction conditions, they had to do two arithmetic tasks involving the same operand (e.g., + 2 and + 7, - 3 and - 5). Participants performed one addition and one subtraction task (e.g., + 2 and - 7, - 3 and + 5) in the dual-operation condition. The functional magnetic resonance imaging results showed strict left prefrontal and parietal regions in the single-addition condition and bilateral activation in the single-subtraction condition. Greater activation in the prefrontal and parietal regions was observed in both the dual-operation condition and the dual-addition condition in comparison to the single-addition condition. No greater activation was observed in either the dual-operation condition or dual-subtraction condition in comparison to the single-subtraction condition. These results suggest a constraint imposed by a limit in capacity for the neural activity subserving dual-task performance when one of the tasks places high resource demands on the executive network.
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