Choosing to stop: responses evoked by externally triggered and internally generated inhibition identify a neural mechanism of will

Parkinson, Jim and Haggard, Patrick (2015) Choosing to stop: responses evoked by externally triggered and internally generated inhibition identify a neural mechanism of will. Journal of Cognitive Neuroscience, 27 (10). pp. 1948-1956. ISSN 0898-929X

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Abstract

Inhibiting inappropriate action is key to human behavioural control. Studies of action inhibition largely investigated external stop signals, yet these are rare in everyday life. Instead healthy adults exert "self-control," implying an ability to decide internally to stop actions. We added "choose for yourself" stimuli to a conventional go/no-go task to compare reactive versus intentional action and inhibition. No-go reactions showed the N2 EEG potential characteristic of inhibiting prepotent motor responses, whereas go reactions did not. Interestingly, the N2 component was present for intentional choices both to act and also to inhibit. Thus, free choices involved a first step of intentionally inhibiting prepotent responses before generating or withholding an action. Intentional inhibition has a crucial role breaking the flow of stimulus-driven responding, allowing expression of volitional decisions. Even decisions to initiate self-generated actions require this prior negative form of volition, ensuring the "freedom from immediacy" characteristic of human behaviour.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
School of Psychology > Psychology
Subjects: B Philosophy. Psychology. Religion
B Philosophy. Psychology. Religion > BF Psychology
B Philosophy. Psychology. Religion > BF Psychology > BF0309 Consciousness. Cognition Including learning, attention, comprehension, memory, imagination, genius, intelligence, thought and thinking, psycholinguistics, mental fatigue
Depositing User: James Parkinson
Date Deposited: 24 May 2016 13:42
Last Modified: 06 Mar 2017 16:58
URI: http://sro.sussex.ac.uk/id/eprint/61148

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