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Abstract
Transcranial Direct Current Stimulation (tDCS) has been used as an alternative treatment for pain reduction in fibromyalgia. In this study, in addition to behavioral measures, we analyzed oscillations in alpha 2 frequency band in the frontal, occipital, and parietal regions, in response to the application of two neuromodulation protocols in fibromyalgia. The study was a randomized, double-blind, placebo-controlled clinical trial with 31 women diagnosed with fibromyalgia. The participants were allocated to three groups with the anodic stimulation applied on the left motor cortex: Group 1, for five consecutive days; Group 2, for 10 consecutive days; and Group 3, sham stimulation for five consecutive days. Statistical analysis showed a reduction in pain intensity after treatment for groups in general [F (1.28) = 8.02; p = 0.008; η2 = 0.223], in addition to a reduction in alpha 2 in the frontal (p = 0.039; d = 0.384) and parietal (p = 0.021; d = 0.520) regions after the treatment on five consecutive days. We conclude that neuromodulation protocols produced similar effects on pain reduction, but differed with respect to the changes in the alpha 2 frequency band in the frontal and parietal regions.
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Details
1 Federal University of Paraiba, Department of Psychology, João Pessoa, Brazil (GRID:grid.411216.1) (ISNI:0000 0004 0397 5145)
2 Federal University of Paraiba, Department of Physiotherapy, João Pessoa, Brazil (GRID:grid.411216.1) (ISNI:0000 0004 0397 5145)
3 Federal University of Paraiba, Department of Psychology, João Pessoa, Brazil (GRID:grid.411216.1) (ISNI:0000 0004 0397 5145); University of Córdoba, Department of Psychology, Córdoba, Spain (GRID:grid.411901.c) (ISNI:0000 0001 2183 9102); Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Córdoba, Spain (GRID:grid.411901.c)