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首页> 外文期刊>International journal of psychophysiology: official journal of the International Organization of Psychophysiology >The pure electrophysiology of stopping.
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The pure electrophysiology of stopping.

机译：停止的纯电生理学。

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In the stop-signal task, subjects should withhold their response in a choice reaction time task when a stop-signal, usually a tone, is presented. Successful stops have been associated with event-related potentials (ERPs) featuring a larger frontocentral positivity relative to failed stops. The functional interpretation of this stop-P3 has been disputed, because stop-ERPs are distorted by overlap from ERPs elicited by preceding go-stimuli. We effectively removed confounding potentials with the 'adjacent response filter method (ADJAR)'. Confirming an interpretation in terms of response inhibition, the stop-P3 remained and overlap removal resulted in a more anterior distribution. As a new finding, the N1 was larger on trials with successful stops, which suggests that inhibitory performance at least partly depended on the ability to switch attention to the stop-signal. Finally, the parietal P3 tended to peak earlier for successful than for failed stops. This is in line with the Horse Race Model, which states that faster stop-processes have a higher chance of winning the race against the go-process.
机译：在停止信号任务中，当出现停止信号（通常是声音）时，受试者应在选择反应时间任务中停止其反应。成功的停止与事件相关的电位（ERP）相关，事件相关的电位相对于失败的停止具有更大的额中央正性。该stop-P3的功能解释存在争议，因为stop-ERPs被先前的刺激刺激引起的ERPs重叠所扭曲。我们使用“邻近响应过滤器方法（ADJAR）”有效地消除了混淆的可能性。确认了对反应抑制的解释，stop-P3保留下来，重叠去除导致更前的分布。作为一项新发现，在成功停止的试验中，N1更大，这表明抑制性能至少部分取决于将注意力转移到停止信号上的能力。最终，顶壁P3的峰值倾向于成功停止比失败停止更早。这与赛马模型相吻合，后者指出，更快的停止过程更有可能赢得与进行过程的比赛。

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