Search results for "tDCS"

Brain stimulation in migraine

2013

Migraine is a very prevalent disease with great individual disability and socioeconomic burden. Despite intensive research effort in recent years, the etiopathogenesis of the disease remains to be elucidated. Recently, much importance has been given to mechanisms underlying the cortical excitability that has been suggested to be dysfunctional in migraine. In recent years, noninvasive brain stimulation techniques based on magnetic fields (transcranial magnetic stimulation, TMS) and on direct electrical currents (transcranial direct current stimulation, tDCS) have been shown to be safe and effective tools to explore the issue of cortical excitability, activation, and plasticity in migraine. M…

Resting state FMRI: A tool to investigate functional connectivity modulation induced by transcranial direct current stimulation of the motor network

2016

Introduction: Resting-state functional connectivity (fcMRI) represents a novel fMRI approach that allows detection of temporal correlations in spontaneous BOLD signal oscillations while subjects rest quietly in the scanner. Under resting conditions the brain is engaged in spontaneous activity that causes a low frequencies (<0.1 Hz) BOLD signal fluctuations. Functional connectivity (FC) can be defined as the synchrony of neural activity among spatially distant regions. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that is known to modulate cortical activity and FC among brain regions, as measured by functional magnetic resonance imaging. This st…

Reading changes in children and adolescents with dyslexia after transcranial direct current stimulation.

2016

Noninvasive brain stimulation offers the possibility to induce changes in cortical excitability and it is an interesting option as a remediation tool for the treatment of developmental disorders. This study aimed to investigate the effect of transcranial direct current stimulation (tDCS) on reading and reading-related skills of children and adolescents with dyslexia. Nineteen children and adolescents with dyslexia performed different reading and reading-related tasks (word, nonword, and text reading; lexical decision; phonemic blending; verbal working memory; rapid automatized naming) in a baseline condition without tDCS and after 20 min of exposure to three different tDCS conditions: left …

Recovery of aphasia: a case study with “dual” tdcs.

2011

Objectives. In the present study we used a “dual” tDCS (Vines et al., 2008; Giglia et al., 2011) training on inferior frontal gyrus’s (IFG) areas in order to improve the linguistic performance of EBE, an Italian female, left-handed, presenting a global aphasia following a stroke of right middle cerebral artery. Materials. For the picture naming task, 20 object and 20 action images, selected from a set of picture standardized for frequency, were presented on a paper sheet one at time. Method. Stimulation was used at 1mA for 15 minutes. Dual tDCS was given over both IFGs, cathode in the right (damaged areas) and anode in the left (preserved areas) daily for two weeks (weekend-free). The posit…

FUNCTIONAL CONNECTIVITY MODULATION INDUCED BY TRANSCRANIAL DIRECT CURRENT STIMULATION OF THE MOTOR NETWORK

2015

Background: Brain functions arise from the orchestrated activation and cooperation of networks of regions whose specific relationship varies dynamically across functional states. Resting state functional Magnetic Resonance Imaging (RS-fMRI) analyses focuses on spontaneous low frequency fluctuations (< 0.1 Hz) in the BOLD signal and investigates synchronous activations between regions that are spatially distinct (functional connectivity, FC), occurring in the absence of a task or stimulus. Transcranial Direct Current Stimulation (tDCS) is a non-invasive brain stimulation technique that is known to modulate cortical activity and FC among brain regions, as measured by functional Magnetic Reson…

Cathodal occipital tDCS is unable to modulate the sound induced flash illusion in migraine

2019

Migraine is a highly disabling disease characterized by recurrent pain. Despite an intensive effort, mechanisms of migraine pathophysiology still represent an unsolved issue. Evidence from both animal and human studies suggests that migraine is characterized by hyperresponsivity or hyperexcitability of sensory cortices, especially the visual cortex. This phenomenon, in turn, may affect multisensory processing. Indeed, migraineurs present with an abnormal, reduced, perception of the Sound-induced Flash Illusion (SiFI), a crossmodal illusion that relies on optimal integration of visual and auditory stimuli by the occipital visual cortex. Decreasing visual cortical excitability with transcrani…

Transkraniaalisen tasavirtastimulaation vaikutukset erottelu- ja käänteisoppimiseen sekä reagointiherkkyyden muutoksiin

2017

Transkraniaalisella tasavirtastimulaatiolla (tDCS) tarkoitetaan menetelmää, jossa johdetaan heikkoa sähkövirtaa aivokudosten läpi elektrodilta toiselle. Tutkimusten mukaan tDCS:lla näyttäisi olevan monenlaisia kliinisiä ja kognitiivisia vaikutuksia aina masennuksen hoidosta työmuistin parantamiseen. Tulokset ovat kuitenkin monin paikoin varsin ristiriitaisia, eikä stimulaation tarkoista vaikutusmekanismeistakaan olla päästy varmuuteen. Tässä tutkimuksessa halusimme tutkia kokeellisesti tDCS:n vaikutuksia erottelu- ja käänteisoppimiseen sekä reagointiherkkyyden muutoksiin silmäniskuehdollistumisen avulla. Kokeeseen osallistui 39 iältään 18-29-vuotiasta koehenkilöä. Tutkittavat jaettiin kahte…

Reversed Polarity bi-tDCS over M1 during a Five Days Motor Task Training Did Not Influenced Motor Learning. A Triple-Blind Clinical Trial

2021

This article belongs to the Special Issue Applications of Neuromodulation on Pain and Motor Learning.

Behavioral and hemodynamic effects of prefrontal anodal stimulation in healthy older adults: a simultaneous tDCS/fNIRS study

2019

Transcranial Direct Current Stimulation over the Right Inferior Parietal Cortex Reduces Transposition Errors in a Syllabic Reordering Task

2021

Evidence derived from functional imaging and brain-lesion studies has shown a strong left lateralization for language, and a complementary right hemisphere dominance for visuospatial abilities. Nevertheless, the symmetrical functional division of the two hemispheres gives no reason for the complexity of the cognitive operations involved in carrying out a linguistic task. In fact, a growing number of neuroimaging and neurostimulation studies suggest a possible right hemisphere involvement in language processing. The objective of this work was to verify the contribution of the left and right parietal areas in a phonological task. We applied anodal transcranial direct current stimulation (tDCS…