Testing the physiological plausibility of conflicting psychological models of response inhibition: A forward inference fMRI study
Publication year
2017Source
Behavioural Brain Research, 333, (2017), pp. 192-202ISSN
Publication type
Article / Letter to editor
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Organization
PI Group Motivational & Cognitive Control
Journal title
Behavioural Brain Research
Volume
vol. 333
Page start
p. 192
Page end
p. 202
Subject
170 000 Motivational & Cognitive ControlAbstract
The neural mechanisms underlying response inhibition and related disorders are unclear and controversial for several reasons. First, it is a major challenge to assess the psychological bases of behaviour, and ultimately brain-behaviour relationships, of a function which is precisely intended to suppress overt measurable behaviours. Second, response inhibition is difficult to disentangle from other parallel processes involved in more general aspects of cognitive control. Consequently, different psychological and anatomo-functional models coexist, which often appear in conflict with each other even though they are not necessarily mutually exclusive. The standard model of response inhibition in go/no-go tasks assumes that inhibitory processes are reactively and selectively triggered by the stimulus that participants must refrain from reacting to. Recent alternative models suggest that action restraint could instead rely on reactive but non-selective mechanisms (all automatic responses are automatically inhibited in uncertain contexts) or on proactive and non-selective mechanisms (a gating function by which reaction to any stimulus is prevented in anticipation of stimulation when the situation is unpredictable). Here, we assessed the physiological plausibility of these different models by testing their respective predictions regarding event-related BOLD modulations (forward inference using fMRI). We set up a single fMRI design which allowed for us to record simultaneously the different possible forms of inhibition while limiting confounds between response inhibition and parallel cognitive processes. We found BOLD dynamics consistent with non-selective models. These results provide new theoretical and methodological lines of inquiry for the study of basic functions involved in behavioural control and related disorders.
This item appears in the following Collection(s)
- Academic publications [243984]
- Donders Centre for Cognitive Neuroimaging [3983]
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