Ludwig-Maximilian-University, General and Experimental Psychology, D-80802 Munich, Germany.
Ludwig-Maximilian-University, General and Experimental Psychology, D-80802 Munich, Germany.
Biol Psychol. 2019 Nov;148:107747. doi: 10.1016/j.biopsycho.2019.107747. Epub 2019 Aug 27.
Successful motor control during behavioral conflicts relies on neural adjustments that can occur reactively (i.e., after conflict occurrence) and proactively (i.e., in preparation prior to conflicts). While midfrontal delta/theta oscillations are known to play a role for reactive control, their relevance for proactive control is unclear. Using EEG, we investigated the role of midfrontal oscillations during conflict preparation in a motor conflict task, where a predictive cue either indicated no or an increased likelihood for an action conflict. During conflict preparation, increased conflict likelihood led to a proactive modulation of neural oscillations related to both motor processing (central beta) and sensory processing (posterior alpha). While midfrontal control oscillations significantly increased during conflict occurrence, increased conflict likelihood did not change midfrontal oscillatory activity during conflict preparation. This dissociation suggests that, while midfrontal oscillations are related to reactive conflict adjustments, proactive neural adjustment can be implemented without midfrontal oscillatory control.
成功的行为冲突中的运动控制依赖于可以反应性发生（即冲突发生后）和前瞻性发生（即在冲突发生前进行准备）的神经调整。已知前额中部 delta/theta 振荡在反应性控制中起作用，但它们与前瞻性控制的相关性尚不清楚。使用 EEG，我们在运动冲突任务中研究了前额中部振荡在冲突准备期间的作用，在该任务中，预测线索要么表示没有，要么表示增加了动作冲突的可能性。在冲突准备期间，冲突可能性的增加导致与运动处理（中央 beta）和感觉处理（后部 alpha）相关的神经振荡的主动调制。虽然在冲突发生期间前额中部控制振荡显著增加，但增加的冲突可能性并没有改变冲突准备期间前额中部的振荡活动。这种分离表明，虽然前额中部振荡与反应性冲突调整有关，但无需前额中部振荡控制即可实现前瞻性神经调整。
