Carrillo-de-la-Peña M T, Bonilla F M, González-Villar A J
Psychophysiology Lab, Faculty of Psychology, Universdad de Santiago de Compostela, Spain.
Laboratory of Experimental Psychology, Faculty of Psychology, Universidad El Bosque, Colombia.
Biol Psychol. 2019 Apr;143:85-92. doi: 10.1016/j.biopsycho.2019.01.010. Epub 2019 Feb 23.
To clarify how the modality of stop signals affects the ability to suppress ongoing actions, we compared behavioural indices and event-related potentials (ERPs) recorded in healthy volunteers performing visual and auditory stop-signal tasks. Auditory stop signals were associated with faster reaction times and shorter stop-N2 and stop-P3 latencies. Given that the tasks did not differ in attentional/arousal processes (go-P3 or stop-P3 amplitudes) or motor preparation (LRP amplitude, onset or latency), our results suggest that stop signal modality mainly affects bottom-up sensory processes (faster auditory processing). The ERP waveform obtained by subtracting successfully stopped from unsuccessfully stopped trials showed similar amplitude and topography in both tasks, indicating that the strength of top-down processes related to inhibition was independent of modality. The findings contribute further knowledge about the variables associated with efficient inhibition and have practical implications for the design of settings or interventions to improve reactive inhibition.
为了阐明停止信号的模态如何影响抑制正在进行动作的能力，我们比较了在执行视觉和听觉停止信号任务的健康志愿者中记录的行为指标和事件相关电位（ERP）。听觉停止信号与更快的反应时间以及更短的停止N2和停止P3潜伏期相关。鉴于任务在注意力/唤醒过程（启动P3或停止P3振幅）或运动准备（侧化准备电位振幅、起始或潜伏期）方面没有差异，我们的结果表明停止信号模态主要影响自下而上的感觉过程（更快的听觉处理）。通过从未成功停止的试验中减去成功停止的试验获得的ERP波形在两项任务中显示出相似的振幅和地形图，表明与抑制相关的自上而下过程的强度与模态无关。这些发现为与有效抑制相关的变量提供了进一步的知识，并对改善反应抑制的环境或干预措施的设计具有实际意义。
