Journal
EXPERIMENTAL BRAIN RESEARCH
Volume 196, Issue 3, Pages 467-474Publisher
SPRINGER
DOI: 10.1007/s00221-009-1862-x
Keywords
Response inhibition; Dopamine; Spontaneous eyeblink
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The inhibitory control of actions has been claimed to rely on dopaminergic pathways. Given that this hypothesis is mainly based on patient and drug studies, some authors have questioned its validity and suggested that beneficial effects of dopaminergic stimulants on response inhibition may be limited to cases of suboptimal inhibitory functioning. We present evidence that, in carefully selected healthy adults, spontaneous eyeblink rate, a marker of central dopaminergic functioning, reliably predicts the efficiency in inhibiting unwanted action tendencies in a stop-signal task. These findings support the assumption of a modulatory role for dopamine in inhibitory action control.
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