Evidence for a close relationship between conscious effort and anterior cingulate cortex activity
Evidence for a close relationship between conscious effort and anterior cingulate cortex activity
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DOI：
10.1016/j.ijpsycho.2004.10.002
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发表时间：
2005-04-01
影响因子：
3
通讯作者：
Hegerl, U
中科院分区：
文献类型：
--
作者：
Mulert, C;Menzinger, E;Hegerl, U
前扣带皮层（ACC）的功能在过去的几年中一直在冲突监控和错误检测的背景下进行讨论。此外，行政协调会的活动是在“有意识的努力”的范围内描述的。最近的神经生理学和神经影像学研究已经描述了ACC活性和简单或选择反应时间实验中的反应时间之间的负相关性。对这一发现的一种解释是，努力与ACC活动之间存在关系。目前在健康志愿者（n = 35）中进行的ERP-LORETA研究旨在直接研究这种关系。在这个实验中，三个条件进行了研究：条件I是一个选择反应任务的指令保持放松的任务（放松条件），条件II是相同的选择反应任务的指令按下相应的按钮尽可能快和正确的（努力条件）。条件III只是在没有按下按钮的情况下听音调（控制条件）。受试者必须在每次实验运行后直接在视觉模拟量表上对他们实际花费的努力进行评分。与放松条件相比，受试者在高努力条件下的反应时间显着缩短，NI幅度增加，ACC活性增加。在亚组分析中，这种效应仅存在于（根据他们的自我评级）严格遵循说明的受试者中。这些结果提供了直接的证据，有意识的努力和ACC活动之间的密切关系，并建议应用的努力自我评价的有用性。(c)2004 Elsevier B. V.保留所有权利。
The function of the anterior cingulate cortex (ACC) has been discussed in the last years in the context of conflict monitoring and error detection. In addition, ACC activity has been described in the context of "conscious effort". Recent neurophysiological and neuroimaging studies have described a negative correlation between ACC activity and reaction times in simple or choice reaction time experiments. One suggested explanation for this finding has been that there is a relationship between effort and ACC activity. The present ERP-LORETA study of healthy volunteers (n = 35) was intended to directly investigate this relationship. In this experiment, three conditions were investigated: condition I was a choice reaction task with the instruction to stay relaxed during the task (relaxed condition), condition II was the same choice reaction task with the instruction to press the respective button as fast and correct as possible (effort condition). Condition III was just listening to the tones without button press (control condition). Subjects had to score directly after each experimental run on a visual analogue scale the amount of effort they have actually spent. The subjects showed significantly shorter reaction times during the high effort condition in comparison to the relaxed condition, as well as increased NI amplitudes and increased ACC activity. In a subgroup analysis, this effect was present only in subjects who were (according to their self-ratings) following the instructions closely. These results provide direct evidence for a close relationship between conscious effort and ACC activity and suggest the usefulness of the applied effort-self-rating. (c) 2004 Elsevier B.V. All rights reserved.