A core system for the implementation of task sets
A core system for the implementation of task sets
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DOI：
10.1016/j.neuron.2006.04.031
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发表时间：
2006-06-01
期刊：
影响因子：
16.2
通讯作者：
Petersen, Steven E.
中科院分区：
文献类型：
--
作者：
Dosenbach, Nico U. F.;Visscher, Kristina M.;Petersen, Steven E.
在执行任务时，人们被认为采用配置即时数据处理的任务集。最近开发的混合块/事件相关设计允许在功能磁共振成像实验中提取任务集相关信号，包括与指示任务块开始的线索相关的活动、任务块持续时间内持续的“集合维护”活动以及不同试验类型的事件相关信号。使用 10 种不同任务和 183 名受试者对混合设计实验的数据进行联合分析。背侧前扣带皮层/内侧上额叶皮层（dACC/msFC）和双侧前岛叶/额叶盖（al/fO）在所有或几乎所有任务中都显示出可靠的启动提示和持续激活。这些区域还在任务子集中携带了最可靠的错误相关信号，表明这些区域形成了“核心”任务集系统。通常与任务控制相关的前额叶区域在较小的任务子集中携带任务集信号，并且缺乏跨信号类型的收敛。
When performing tasks, humans are thought to adopt task sets that configure moment-to-moment data processing. Recently developed mixed blocked/eventrelated designs allow task set-related signals to be extracted in fMRI experiments, including activity related to cues that signal the beginning of a task block, "set-maintenance" activity sustained for the duration of a task block, and event-related signals for different trial types. Data were conjointly analyzed from mixed design experiments using ten different tasks and 183 subjects. Dorsal anterior cingulate cortex/medial superior frontal cortex (dACC/msFC) and bilateral anterior insula/frontal operculum (al/fO) showed reliable start-cue and sustained activations across all or nearly all tasks. These regions also carried the most reliable error-related signals in a subset of tasks, suggesting that the regions form a "core" task-set system. Prefrontal regions commonly related to task control carried task-set signals in a smaller subset of tasks and lacked convergence across signal types.