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Enhancement of pain inhibition by working memory with anodal transcranial direct current stimulation of the left dorsolateral prefrontal cortex

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Deldar, Zoha et Rustamov, Nabi et Bois, Suzie et Blanchette, Isabelle et Piché, Mathieu (2018). Enhancement of pain inhibition by working memory with anodal transcranial direct current stimulation of the left dorsolateral prefrontal cortex. Journal of Physiological Sciences, 68 (6). p. 825-836. ISSN 1880-6546 DOI 10.1007/s12576-018-0598-4

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Résumé

The aim of this study was to examine whether transcranial direct current stimulation (tDCS) of the dorsolateral prefrontal cortex (DLPFC) enhances pain inhibition by improving working memory (WM). Forty healthy volunteers participated in two tDCS sessions. Pain was evoked by electrical stimulation at the ankle. Participants performed an n-back task (0-back and 2-back). The experimental protocol comprised five counterbalanced conditions (0-back, 2-back, pain, 0-back with pain and 2-back with pain) that were performed twice (pre-tDCS baseline and during tDCS). Compared with the pre-tDCS baseline values, anodal tDCS decreased response times for the 2-back condition (p < 0.01) but not for the 0-back condition (p > 0.5). Anodal tDCS also decreased pain ratings marginally in the 2-back with pain condition, but not the 0-back with pain condition (p = 0.052 and p > 0.2, respectively). No effect was produced by sham tDCS for any condition (p > 0.2). These results indicate that tDCS of the left DLPFC may enhance pain inhibition by improving WM. © 2018, The Physiological Society of Japan and Springer Japan KK, part of Springer Nature.

Type de document: Article
Mots-clés libres: anxiety cognition descending modulation neuromodulation nociceptive adult electrostimulation female human male nociception normal human pain pathophysiology physiology prefrontal cortex psychology short term memory transcranial direct current stimulation young adult electric Stimulation healthy Volunteers humans memory, short-term
Date de dépôt: 26 avr. 2021 20:21
Dernière modification: 26 avr. 2021 20:21
Version du document déposé: Version officielle de l'éditeur
URI: http://depot-e.uqtr.ca/id/eprint/9584

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