Review of tDCS Configurations for Stimulation of the Lower-Limb Area of Motor Cortex and Cerebellum

Quiles, Vicente; Ferrero, Laura; Íáñez, Eduardo; Ortiz, Mario; Azorín, José M.

doi:10.3390/brainsci12020248

Cited by 6 publications

(2 citation statements)

References 117 publications

(307 reference statements)

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“…Second, despite three randomized ordered sessions, it is possible that a learning effect would have manifested by participants. Finally, with reference to the position of the electrodes, the tDCS effects with respect to the stimulation area for the lower limb are different than for the upper limb, and different areas can be stimulated at the same time with less or more precision (Foerster et al, 2018;Patel & Madhavan, 2019;Quiles et al, 2022). In this first study where we investigated how tDCS could induce effects in a classical relation between movement amplitude and accuracy in a lower limb quick pointing action, we cannot rule out an effect on M1 due to a possible modulation induced by the position of our electrodes (Foerster et al, 2018;Patel & Madhavan, 2019;Quiles et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Transcranial direct current stimulation (tDCS) modulates motor execution in a limb reaching task

Zandonai

Bertucco

Graziani

et al. 2022

Eur J of Neuroscience

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The majority of human activities show a trade‐off between movement speed and accuracy. Here we tested 16 participants in a quick pointing action after 20 minutes (2 mA) of transcranial direct current stimulation (tDCS) delivered at the supplementary motor area in a single‐blind crossover design study for testing the feedforward components in the control of action. tDCS stimuli were delivered in three randomized sessions of stimulations as anodal, cathodal and sham as a control. The task performed pre‐ and post‐tDCS stimulation, was to point as fast and as precise as possible with the big toe to targets having different sizes (2 and 8 cm; Width) and positioned at different distances (20 and 60 cm; Distance). An optoelectronic motion capture system was used to collect the kinematics of movement. The result indicates that individuals after receiving anodal stimulation decreased their movement time and increased their movement speed, while the opposite happened after receiving a cathodal stimulation. The scarcity of studies in this area invites us to plan a research that aims at the trade‐off especially in the clinical settings.

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Section: Discussionmentioning

confidence: 99%

Transcranial direct current stimulation (tDCS) modulates motor execution in a limb reaching task

Zandonai

Bertucco

Graziani

et al. 2022

Eur J of Neuroscience

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“…For example, electrocorticographic activity over the sensorimotor cortex is correlated with H-reflexes in the beta and gamma bands in rodents, and modulation of the electroencephalographic sensorimotor rhythm is related to H-reflex amplitude modulation in people (Boulay et al 2015 ; Jarjees and Vuckovic 2016 ; Thompson et al 2018 ). Thus, tDCS that affects cortical activity (Roy et al 2014 ; Hordacre et al 2018 ) and corticospinal excitability (Nitsche and Paulus 2000 ; Quiles et al 2022 ) may affect the excitability of spinal reflex pathways. However, the effects of tDCS on spinal reflex excitability are not apparent or consistent across currently available literatures.…”

Section: Introductionmentioning

confidence: 99%

Effects of active and sham tDCS on the soleus H-reflex during standing

2023

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Weak transcranial direct current stimulation (tDCS) is known to affect corticospinal excitability and enhance motor skill acquisition, whereas its effects on spinal reflexes in actively contracting muscles are yet to be established. Thus, in this study, we examined the acute effects of Active and Sham tDCS on the soleus H-reflex during standing. In fourteen adults without known neurological conditions, the soleus H-reflex was repeatedly elicited at just above M-wave threshold throughout 30 min of Active (N = 7) or Sham (N = 7) 2-mA tDCS over the primary motor cortex in standing. The maximum H-reflex (Hmax) and M-wave (Mmax) were also measured before and immediately after 30 min of tDCS. The soleus H-reflex amplitudes became significantly larger (by 6%) ≈1 min into Active or Sham tDCS and gradually returned toward the pre-tDCS values, on average, within 15 min. With Active tDCS, the amplitude reduction from the initial increase appeared to occur more swiftly than with Sham tDCS. An acute temporary increase in the soleus H-reflex amplitude within the first minute of Active and Sham tDCS found in this study indicates a previously unreported effect of tDCS on the H-reflex excitability. The present study suggests that neurophysiological characterization of Sham tDCS effects is just as important as investigating Active tDCS effects in understanding and defining acute effects of tDCS on the excitability of spinal reflex pathways.

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Computation of group-level electric field in lower limb motor area for different tDCS montages

Hamajima

Gómez-Tames

Uehara

et al. 2023

Clinical Neurophysiology

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Review of tDCS Configurations for Stimulation of the Lower-Limb Area of Motor Cortex and Cerebellum

Cited by 6 publications

References 117 publications

Transcranial direct current stimulation (tDCS) modulates motor execution in a limb reaching task

Transcranial direct current stimulation (tDCS) modulates motor execution in a limb reaching task

Effects of active and sham tDCS on the soleus H-reflex during standing

Computation of group-level electric field in lower limb motor area for different tDCS montages

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