The role of stop‐signal probability and expectation in proactive inhibition
The role of stop‐signal probability and expectation in proactive inhibition
复制标题
停止信号概率和期望在主动抑制中的作用
DOI：
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发表时间：
2015
影响因子：
3.4
通讯作者：
S. Plessis
中科院分区：
文献类型：
--
作者：
M. Vink;R. Kaldewaij;B. Zandbelt;P. Pas;S. Plessis
对将要发生的事情的主观信念在包括反应抑制在内的许多认知领域都发挥着重要作用。然而，研究抑制的任务并不区分对指示停止信号概率的客观背景线索的处理和对停止信号将会或将不会发生的主观期望。本研究考察了停止信号概率和停止信号期望对主动抑制的影响。20名参与者在接受功能性磁共振成像扫描的同时，执行了一项修改后的停车信号预测任务。在每次试验开始时，停止信号的概率由一个提示(0%或0%)指示，参与者必须指出他们是否预期会出现停止信号(是/否/不知道)。受试者在停止信号概率为0%的试验中放慢了反应速度，但当他们预计会出现停止信号时，这种主动反应的减慢幅度甚至更大。分析是在以前与主动抑制相关的大脑区域进行的。当参与者预期停止信号出现时，纹状体、辅助运动区和左侧背侧运动前皮质的激活在提示期间增加。相反，在刺激-反应期间，右额下回和右顶下回的激活与背景线索的处理有关，这些线索发出客观停止信号的概率，而与预期无关。这些数据表明，主动抑制既依赖于对客观背景任务信息的加工，也依赖于对停止信号的主观期望。
The subjective belief of what will happen plays an important role across many cognitive domains, including response inhibition. However, tasks that study inhibition do not distinguish between the processing of objective contextual cues indicating stop‐signal probability and the subjective expectation that a stop‐signal will or will not occur. Here we investigated the effects of stop‐signal probability and the expectation of a stop‐signal on proactive inhibition. Twenty participants performed a modified stop‐signal anticipation task while being scanned with functional magnetic resonance imaging. At the beginning of each trial, the stop‐signal probability was indicated by a cue (0% or > 0%), and participants had to indicate whether they expected a stop‐signal to occur (yes/no/don't know). Participants slowed down responding on trials with a > 0% stop‐signal probability, but this proactive response slowing was even greater when they expected a stop‐signal to occur. Analyses were performed in brain regions previously associated with proactive inhibition. Activation in the striatum, supplementary motor area and left dorsal premotor cortex during the cue period was increased when participants expected a stop‐signal to occur. In contrast, activation in the right inferior frontal gyrus and right inferior parietal cortex activity during the stimulus‐response period was related to the processing of contextual cues signalling objective stop‐signal probability, regardless of expectation. These data show that proactive inhibition depends on both the processing of objective contextual task information and the subjective expectation of stop‐signals.
影响因子：
6.6
作者：
Casey, B. J.;Getz, Sarah;Galvan, Adriana
通讯作者：
Galvan, Adriana
影响因子：
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作者：
Dias, Elisa C.;Butler, Pamela D.;Hoptman, Matthew J.;Javitt, Daniel C.
通讯作者：
Javitt, Daniel C.
DOI：
10.1037/a0012726
发表时间：
2009-06
影响因子：
2.1
作者：
Verbruggen, Frederick;Logan, Gordon D.
通讯作者：
Logan, Gordon D.