Department of Psychology, University of Cologne, Cologne, Germany.
Psychophysiology. 2012 Jan;49(1):56-72. doi: 10.1111/j.1469-8986.2011.01282.x. Epub 2011 Sep 6.
The effects of force production on medial-frontal negativity (MFN), reflecting the activity of an internal action-monitoring system, were investigated in a force-production task. A precue indicated a low or high force before a stimulus signaled the execution of the same or opposite force. An incorrectly exerted force was assumed to involve an error of force selection if the opposite force was required (invalid precue), and an error of force execution if the same force was required (valid precue). The task was repeated to examine any improvements in monitoring sensitivity. No force-related effects were observed on MFN amplitude. Although performance improved, there was no evidence of a force-error sensitive monitoring system. As the MFN and motor activity were affected by the precue invalidity regardless of the response outcome, the MFN might reflect the activity of a general action-evaluation system that is indirectly related to motor activation.
在一项力量产生任务中，研究了力量产生对反映内部动作监控系统活动的正中额前负波（MFN）的影响。在刺激信号表示执行相同或相反力量之前，预提示指示低或高力量。如果需要相反的力量（无效预提示），则假定错误地施加的力量涉及力量选择错误，而如果需要相同的力量（有效预提示），则假定力量执行错误。重复任务以检查监控灵敏度的任何提高。MFN 幅度上没有观察到与力量相关的影响。尽管表现有所提高，但没有证据表明存在力量错误敏感监控系统。由于 MFN 和运动活动受到预提示无效性的影响，而与反应结果无关，因此 MFN 可能反映了一般动作评估系统的活动，该系统与运动激活间接相关。
