“…In this study, we first hypothesized that after a tDCS session, the cognitive–motor interference associated with DT performance would decrease in women with FM. In this regard, previous studies have evaluated the effects of tDCS in PFC (offline) on cognitive interference in young adults [ 27 , 44 , 45 , 46 , 47 , 58 ], healthy older people [ 48 , 49 ] and in Parkinson’s patients [ 97 ]. Results of these studies have shown that tDCS could help to reduce cognitive–motor interference during DT performance [ 27 , 44 , 45 , 46 , 47 , 48 , 49 , 97 ].…”
Section: Discussionmentioning
confidence: 99%
“…Since the DT involves the prefrontal cortex in the main role [ 23 ], the active electrode will be placed on the left prefrontal cortex, corresponding to the F3 region of the international 10–20 electrode placement system. The return electrode will be placed on the contralateral supraorbital region (Fp2) [ 27 , 44 , 45 , 46 , 48 , 49 , 57 , 58 ]. At the same time, the HRV and EEG signals will be recorded at Cz, C4, P3, P4, and Oz.…”
People with fibromyalgia could experience physical and cognitive impairments. Furthermore, when performing two tasks at the same time, people with fibromyalgia showed a higher dual-task cost compared to a single task than healthy people. This may result in poorer performance of activities of daily living that are commonly presented as a combination of two or more tasks. Transcranial direct current stimulation (tDCS) is a promising nonpharmacological therapy. However, there is controversy regarding the intensities and the effectiveness of this therapy. Thus, the present study will aim: (1) to compare the effectiveness and the impact of two tDCS intensities (1 mA and 2 mA) on cognitive, motor, brain functions, and cardiac autonomic modulation; (2) to study the impact of tDCS on the dual-task performance and creativity after applying tDCS in dorsolateral prefrontal cortex. In this study, 26 women will participate and will be divided into two groups: women with fibromyalgia (n = 13), and healthy controls (n = 13). A reduction in cognitive-motor interference in dual-task performance is expected, as well as a modification in neurophysiological parameters and an improvement in cardiac autonomic modulation. Lastly, no different effects are expected depending on the stimulation intensity applied. The obtained results will help to determine if tDCS in the dorsolateral prefrontal cortex could improve the occupational performance of women with fibromyalgia.
“…In this study, we first hypothesized that after a tDCS session, the cognitive–motor interference associated with DT performance would decrease in women with FM. In this regard, previous studies have evaluated the effects of tDCS in PFC (offline) on cognitive interference in young adults [ 27 , 44 , 45 , 46 , 47 , 58 ], healthy older people [ 48 , 49 ] and in Parkinson’s patients [ 97 ]. Results of these studies have shown that tDCS could help to reduce cognitive–motor interference during DT performance [ 27 , 44 , 45 , 46 , 47 , 48 , 49 , 97 ].…”
Section: Discussionmentioning
confidence: 99%
“…Since the DT involves the prefrontal cortex in the main role [ 23 ], the active electrode will be placed on the left prefrontal cortex, corresponding to the F3 region of the international 10–20 electrode placement system. The return electrode will be placed on the contralateral supraorbital region (Fp2) [ 27 , 44 , 45 , 46 , 48 , 49 , 57 , 58 ]. At the same time, the HRV and EEG signals will be recorded at Cz, C4, P3, P4, and Oz.…”
People with fibromyalgia could experience physical and cognitive impairments. Furthermore, when performing two tasks at the same time, people with fibromyalgia showed a higher dual-task cost compared to a single task than healthy people. This may result in poorer performance of activities of daily living that are commonly presented as a combination of two or more tasks. Transcranial direct current stimulation (tDCS) is a promising nonpharmacological therapy. However, there is controversy regarding the intensities and the effectiveness of this therapy. Thus, the present study will aim: (1) to compare the effectiveness and the impact of two tDCS intensities (1 mA and 2 mA) on cognitive, motor, brain functions, and cardiac autonomic modulation; (2) to study the impact of tDCS on the dual-task performance and creativity after applying tDCS in dorsolateral prefrontal cortex. In this study, 26 women will participate and will be divided into two groups: women with fibromyalgia (n = 13), and healthy controls (n = 13). A reduction in cognitive-motor interference in dual-task performance is expected, as well as a modification in neurophysiological parameters and an improvement in cardiac autonomic modulation. Lastly, no different effects are expected depending on the stimulation intensity applied. The obtained results will help to determine if tDCS in the dorsolateral prefrontal cortex could improve the occupational performance of women with fibromyalgia.
“…Theoretically, the behavioral or functional changes would occur after the plasticity changes. Since most RCTs in our review applied only one single-session stimulation (Zhou et al, 2014(Zhou et al, , 2015Wrightson et al, 2015;Manor et al, 2016;Swank et al, 2016;Mishra and Thrasher, 2021;Pineau et al, 2021;Schneider et al, 2021;Wong et al, 2022a,b) or short intervention period (2-3 weeks) (Schabrun et al, 2016;Manor et al, 2018), the plasticity changes could have not occurred. In addition, the basal ganglia, central to movement 10.3389/fnins.…”
Section: Tdcs Effects On Mobility Functionmentioning
BackgroundIncreasing research has investigated the use of noninvasive brain stimulation (NIBS) on augmenting dual-task (DT) performance.ObjectiveTo investigate the effects of NIBS on DT performance in different populations.MethodsExtensive electronic database search (from inception to November 20, 2022) was conducted in PubMed, Medline, Cochrane Library, Web of Science and CINAHL to identify randomized controlled trials (RCTs) that investigated the effects of NIBS on DT performance. Main outcomes were balance/mobility and cognitive function under both single-task (ST) and DT conditions.ResultsFifteen RCTs were included, involving two types of intervention techniques: transcranial direct current stimulation (tDCS) (twelve RCTs) and repetitive transcranial magnetic stimulation (rTMS) (three RCTs); and four different population groups: healthy young adults, older adults, Parkinson’s disease (PD), and stroke. For tDCS, under DT condition, significant improvement in speed was only observed in one PD and one stroke RCT, and stride time variability in one older adults RCT. Reduction in DTC in some gait parameters was demonstrated in one RCT. Only one RCT showed significant reduction in postural sway speed and area during standing under DT condition in young adults. For rTMS, significant improvements in fastest walking speed and time taken to Timed-up-and-go test under both ST and DT conditions were observed at follow-up in one PD RCT only. No significant effect on cognitive function in any RCT was observed.ConclusionBoth tDCS and rTMS showed promising effects in improving DT walking and balance performance in different populations, however, due to the large heterogeneity of included studies and insufficient data, any firm conclusion cannot be drawn at present.
“…However, one study partially replicated the study of Zhou et al [ 37 ], and the results were inconsistent. Pineau et al [ 31 ] investigated the postural performance in a simple and dual-task with eyes open and closed via assessing the centre of pressure (COP) parameters immediately after a 20 min a-tDCS session. The results showed that acute a-tDCS cannot effectively improve dual-task performance, and they explained that the discrepancy may be due to the physical activity level of participants.…”
Anodal transcranial direct current stimulation (a-tDCS) aims to hone motor skills and improve the quality of life. However, the non-repeatability of experimental results and the inconsistency of research conclusions have become a common phenomenon, which may be due to the imprecision of the experimental protocol, great variability of the participant characteristics within the group, and the irregularities of quantitative indicators. The aim of this study systematically summarised and analysed the effect of a-tDCS on lower extremity sensorimotor control under different experimental conditions. This narrative review was performed following the PRISMA guidelines until June 2022 in Web of Science, PubMed, Science Direct, Google Scholar, and Scopus. The findings of the present study demonstrated that a-tDCS can effectively improve the capabilities of lower extremity sensorimotor control, particularly in gait speed and time-on-task. Thus, a-tDCS can be used as an effective ergogenic technology to facilitate physical performance. In-depth and rigorous experimental protocol with larger sample sizes and combining brain imaging technology to explore the mechanism have a profound impact on the development of tDCS.
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