Department of Psychology, University of Cologne, Cologne, Germany.
PLoS One. 2013;8(1):e54681. doi: 10.1371/journal.pone.0054681. Epub 2013 Jan 22.
The response-related medial-frontal activity (MFN) is often supposed to reflect action-monitoring and error-processing activity. The present force-production task was designed to investigate the effects of two response parameters (i.e., peak response force and time-to-peak, TTP) on the MFN separately. In a 2 × 2 design (high vs. low target force and short vs. long TTP), 22 participants had to produce isometric force pulses to match one of four conditions (e.g., a high target force with a long TTP). Significant main effects of both target force and target TTP were revealed. As previously shown, the MFN amplitude was higher in the high target-force condition than in the low target-force condition. Contrary to the initial expectations, a long TTP had the effect of reducing the MFN amplitude. There was no error-specific effect on the MFN. The force-unit monitoring model (FUMM) is suggested to account for the force- and TTP- specific variations of MFN amplitude, latency and slope.
与反应相关的额中线前区（MFN）活动通常被认为反映了动作监测和错误处理活动。本力产生任务旨在分别研究两个反应参数（即最大反应力和到达峰值时间，TTP）对 MFN 的影响。在 2×2 设计（高与低目标力和短与长 TTP）中，22 名参与者必须产生等长力脉冲以匹配四种条件之一（例如，高目标力与长 TTP）。结果揭示了目标力和目标 TTP 的显著主效应。与之前的结果一致，高目标力条件下的 MFN 幅度高于低目标力条件。与最初的预期相反，长 TTP 会降低 MFN 幅度。MFN 上没有特定于错误的效应。力单元监测模型（FUMM）被建议用来解释 MFN 幅度、潜伏期和斜率的力和 TTP 特异性变化。
