Testing the role of cognitive inhibition in physical endurance using high-definition transcranial direct current stimulation over the prefrontal cortex |
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| Affiliation: | 1. School of Economics, Center for Economic Behavior and Decision-making (CEBD), Neuro & Behavior EconLab (NBEL), Zhejiang University of Finance and Economics, Hangzhou, China;2. College of Economics and Interdisciplinary Center for Social Sciences (ICSS), Zhejiang University, Hangzhou, China;1. UNIV. NIMES, APSY-V, F-30021 Nîmes Cedex 1, France;2. Université Côte d’Azur, LAMHESS, France;3. Centre de Santé Rossetti – PEP06, France;4. Institut Universitaire de France, IRCAN, Nice, France;1. Department of Physical Medicine and Rehabilitation, University of Michigan Medical School, Ann Arbor, MI, USA;2. Sensory Motor Performance Program, Rehabilitation Institute of Chicago, IL, USA;3. Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA;1. Department of Food and Nutrition Science, Sagami Women’s University, Kanagawa, Japan;2. Faculty of Development and Education, Uekusa Gakuen University, Chiba, Japan;3. Faculty of Education, Graduate School of Education, Chiba University, Chiba, Japan;4. Department of Health and Sports Sciences, Faculty of Education, Chiba University, Chiba, Japan;1. School of Electronic Engineering, Xidian University, Xi''an 710071, China;2. Key Laboratory for Behavior and Cognitive Neuroscience of Shaanxi Province, School of Psychology, Shaanxi Normal University, Xi’an 710062, China |
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| Abstract: | The aim of this study was to clarify the role of the prefrontal cortex (PFC) in physical effort regulation. We hypothesized that the PFC would be progressively involved in physical endurance through the engagement of cognitive inhibition, which would be necessary to maintain effort by inhibiting fatigue-related cues. This hypothesis was examined using a double-blind, sham-controlled, within-subjects study (N = 20) using high-definition (HD) transcranial direct current stimulation (tDCS) over the right dorsolateral prefrontal cortex (dlPFC). Participants had to maintain a knee extensor contraction at 30% of their maximal force while simultaneously performing an Eriksen flanker task to evaluate their inhibition performance during the task. Anodal stimulation of the dlPFC influenced response to the cognitive task during exercise, as seen by slower response times and better accuracy. However, it did not lead to any measureable improvement in cognitive inhibition and did not influence endurance time. There was no correlation between cognitive inhibition and the maintenance of physical effort. This result does not indicate a relationship between cognitive inhibition and endurance performance. The contribution of the PFC in physical endurance could be explained through its involvement on decisional processes. |
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| Keywords: | Physical endurance Anodal transcranial direct current stimulation Dorsolateral prefrontal cortex Executive function Cognitive inhibition |
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