Effects of Transcranial Direct Current Stimulation over the Primary Motor Cortex in Improving Postural Stability in Healthy Young Adults

Hou, Jinqian; Nitsche, Michael A.; Yi, Longyan; Kong, Zhaowei; Qi, Feng

doi:10.3390/biology11091370

Cited by 12 publications

(7 citation statements)

References 58 publications

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“…Our findings are in line with previous findings that a-tDCS over M1 improved postural stability by reducing the center of pressure sway area (Hou et al, 2022). tDCS may modulate factors relevant to maintaining postural stability, as muscle stiffness, ankle proprioception, and motor cortex excitability (de Moura et al, 2019).…”

Section: Discussionsupporting

confidence: 93%

“…A study by Kaminski et al, (2016) revealed that 20 minutes of anodal (a)-tDCS bilaterally over M1 leg area during a balance task was effective in facilitating dynamic balance task (DBT) learning in YA. A recent study by Hou et al (2022) further examined the offline effect and showed that one single session of a-tDCS over M1 could decrease the center of pressure (CoP) sway area and improve postural stability in healthy YA. Notably, a systematic review (Halakoo et al, 2023) showed that both a-tDCS and cathodal (c-)tDCS over M1 can vary in their effects on posture and balance, contingent on the study population.…”

Section: Introductionmentioning

confidence: 99%

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Cortical resting-state activities may predict anodal tDCS-induced facilitation of dynamic balance training

Imani,

Godde

2024

Preprint

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In this study by combining a-tDCS with DBT training and targeting two different brain regions, we aimed to find out the effective target for tDCS to facilitate learning performance and enhance balance in younger adults. Besides targeting the sensorimotor cortex (M1), we alternatively applied a-tDCS to the prefrontal cortex (left DLPFC). We further explored changes in resting-state oscillations induced by a-tDCS combined with balance training. Additionally, in this study, we investigated whether rs-EEG can predict practice effects in balance task. Forty-three healthy young adults were recruited for this study. Results revealed that a-tDCS was effective in facilitating balance performance for both experimental groups compared to sham. Further, our data confirmed retention effects for Cz and sham group to the second day of training while this retention was not confirmed for F3 group. Our data did not confirm any transfer effects of DBT to untrained static balance tasks. With respect to the EEG analysis, our data revealed an increase in relative Alpha power in the post relative to the pre-test, independent of Stimulation Group. Results further revealed an association of theta and beta power at pre-test with a practice effect. We conclude that our findings thus substantially extend previous studies by demonstrating the application of a-tDCS to facilitate changes in brain networks in targeted brain areas which are not only improving motor execution but also top-down executive control.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Cortical resting-state activities may predict anodal tDCS-induced facilitation of dynamic balance training

Imani,

Godde

2024

Preprint

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“…The Cz region usually covers bilateral lower-limb area of M1 (Mizuno and Aramaki, 2017). Studies have shown that tDCS targeting the Cz region can modulate the activity of M1, thereby influencing motor control and coordination (Park et al, 2019;Hou et al, 2022). The HD-tDCS consisted of 20-min stimulation of current intensity of 2 mA (Workman et al, 2020a;Workman et al, 2020b).…”

Section: Hd-tdcs Protocolmentioning

confidence: 99%

Effects of high-definition transcranial direct current stimulation on the cortical−muscular functional coupling and muscular activities of ankle dorsi−plantarflexion under running-induced fatigue

Zhan,

Yu,

Xiao

et al. 2023

Front. Physiol.

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Transcranial direct current stimulation (tDCS) can improve motor control performance under fatigue. However, the influences of tDCS on factors contributing to motor control (e.g., cortical−muscular functional coupling, CMFC) are unclear. This double-blinded and randomized study examined the effects of high-definition tDCS (HD-tDCS) on muscular activities of dorsiflexors and plantarflexors and CMFC when performing ankle dorsi–plantarflexion under fatigue. Twenty-four male adults were randomly assigned to receive five sessions of 20-min HD-tDCS targeting primary motor cortex (M1) or sham stimulation. Three days before and 1 day after the intervention, participants completed ankle dorsi–plantarflexion under fatigue induced by prolonged running exercise. During the task, electroencephalography (EEG) of M1 (e.g., C1, Cz) and surface electromyography (sEMG) of several muscles (e.g., tibialis anterior [TA]) were recorded synchronously. The corticomuscular coherence (CMC), root mean square (RMS) of sEMG, blood lactate, and maximal voluntary isometric contraction (MVC) of ankle dorsiflexors and plantarflexors were obtained. Before stimulation, greater beta- and gamma-band CMC between M1 and TA were significantly associated with greater RMS of TA (r = 0.460–0.619, p = 0.001–0.024). The beta- and gamma-band CMC of C1-TA and Cz-TA, and RMS of TA and MVC torque of dorsiflexors were significantly higher after HD-tDCS than those at pre-intervention in the HD-tDCS group and post-intervention in the control group (p = 0.002–0.046). However, the HD-tDCS-induced changes in CMC and muscle activities were not significantly associated (r = 0.050–0.128, p = 0.693–0.878). HD-tDCS applied over M1 can enhance the muscular activities of ankle dorsiflexion under fatigue and related CMFC.

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“…Based on M1 as primary motor area can encode motor execution [ 5 ],tDCS applied bilaterally to the M1 motor cortex has been shown to increase knee flexor and extensor strength in healthy males on the non-dominant side [ 6 ]. In addition, Hou et al [ 6 ] showed that anodal tDCS can instantly improve the static and dynamic balance ability of the healthy young people standing on one leg as well as jumping over a 10 cm obstacle [ 7 ]. This potentially indicates that the use of tDCS may potentially enhance dynamic balance ability in daily living setting environment involving with multiple crossing and jumping abilities.…”

Section: Introductionmentioning

confidence: 99%

The effect of transcranial direct current stimulation on bilateral asymmetry and joint angles of the lower limb for females when crossing obstacles

Wang,

Gu,

Lei

et al. 2023

BMC Sports Sci Med Rehabil

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Background Gait asymmetry is often accompanied by the bilateral asymmetry of the lower limbs. The transcranial direct current stimulation (tDCS) technique is widely used in different populations and scenarios as a potential tool to improve lower limb postural control. However, whether cerebral cortex bilateral tDCS has an interventional effect on postural control as well as bilateral symmetry when crossing obstacles in healthy female remains unknown. Methods Twenty healthy females were recruited in this prospective study. Each participant walked and crossed a height-adjustable obstacle. Two-way repeated ANOVA was used to evaluate the effect of group (tDCS and sham-tDCS) and height (30%, 20%, and 10% leg length) on the spatiotemporal and maximum joint angle parameters for lower limb crossing obstacles. The Bonferroni post-hoc test and paired t-test were used to determine the significance of the interaction effect or main effect. The statistically significant differences were set at p < 0.05. Results The Swing time (SW) gait asymmetry (GA), Stance time (ST) GA, leading limb hip-knee-ankle maximum joint angles and trailing limb hip-knee maximum joint angles decreased in the tDCS condition compared to the sham-tDCS condition at 30%, 20% leg’s length crossing height except for 10% leg’s length, whereas there was a significant decrease in SW/ST GA between the tDCS condition and the sham-tDCS condition at 30%, 20%, 10% leg’s length crossing height (P < 0.05). Conclusion We conclude that tDCS intervention is effective to reduce bilateral asymmetry in spatio-temporal parameters and enhance dynamic balance in female participants during obstacle crossing when the heights of the obstacles were above 10% of the leg’s length. Trial registration No ChiCTR2100053942 (date of registration on December 04, 2021). Prospectively registered in the Chinese Clinical Trial Registry.

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Effects of Transcranial Direct Current Stimulation over the Primary Motor Cortex in Improving Postural Stability in Healthy Young Adults

Cited by 12 publications

References 58 publications

Cortical resting-state activities may predict anodal tDCS-induced facilitation of dynamic balance training

Cortical resting-state activities may predict anodal tDCS-induced facilitation of dynamic balance training

Effects of high-definition transcranial direct current stimulation on the cortical−muscular functional coupling and muscular activities of ankle dorsi−plantarflexion under running-induced fatigue

The effect of transcranial direct current stimulation on bilateral asymmetry and joint angles of the lower limb for females when crossing obstacles

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