Effects of dual transcranial direct current stimulation on post-stroke unilateral visuospatial neglect

Sunwoo, Hyuk; Kim, Yun-Hee; Chang, Won Hyuk; Noh, Soojin; Kim, Eun Jin; Ko, Myoung-Hwan

doi:10.1016/j.neulet.2013.08.064

Cited by 74 publications

(97 citation statements)

References 29 publications

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“…Furthermore, cortical neuromodulation, such as tDCS, may also help to maximize gains induced by behavioural training . Attentional improvement by tDCS has been shown in stroke patients for selective attention (AuYeung et al, 2014;Kang et al, 2009) and for visual spatial neglect (Sparing et al, 2009;Sunwoo et al, 2013).…”

Section: Clinical Relevance Of Attention Deficits and Tdcs As A Neuromentioning

confidence: 99%

Modulation of attention functions by anodal tDCS on right PPC

Roy

Sparing²,

Fink

et al. 2015

Neuropsychologia

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Section: Clinical Relevance Of Attention Deficits and Tdcs As A Neuromentioning

confidence: 99%

Modulation of attention functions by anodal tDCS on right PPC

Roy

Sparing²,

Fink

et al. 2015

Neuropsychologia

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“…Specifically, excitability-increasing protocols (e.g., high-frequency TMS, anodal tDCS) to the right posterior parietal cortex (rPPC) of neglect patients is associated with improved perception in the left visual field [18–20]. Hence, training to upregulate rPPC cortical excitability and/or enhancing residual sensory activation through various means [15, 21] might provide an alternate and potentially safer way to restore visuospatial awareness.…”

Section: Introductionmentioning

confidence: 99%

Increased Alpha-Rhythm Dynamic Range Promotes Recovery from Visuospatial Neglect: A Neurofeedback Study

Ros¹,

Michela²,

Bellman

et al. 2017

Neural Plasticity

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Despite recent attempts to use electroencephalogram (EEG) neurofeedback (NFB) as a tool for rehabilitation of motor stroke, its potential for improving neurological impairments of attention—such as visuospatial neglect—remains underexplored. It is also unclear to what extent changes in cortical oscillations contribute to the pathophysiology of neglect, or its recovery. Utilizing EEG-NFB, we sought to causally manipulate alpha oscillations in 5 right-hemisphere stroke patients in order to explore their role in visuospatial neglect. Patients trained to reduce alpha oscillations from their right posterior parietal cortex (rPPC) for 20 minutes daily, over 6 days. Patients demonstrated successful NFB learning between training sessions, denoted by improved regulation of alpha oscillations from rPPC. We observed a significant negative correlation between visuospatial search deficits (i.e., cancellation test) and reestablishment of spontaneous alpha-rhythm dynamic range (i.e., its amplitude variability). Our findings support the use of NFB as a tool for investigating neuroplastic recovery after stroke and suggest reinstatement of intact parietal alpha oscillations as a promising target for reversing attentional deficits. Specifically, we demonstrate for the first time the feasibility of EEG-NFB in neglect patients and provide evidence that targeting alpha amplitude variability might constitute a valuable marker for clinical symptoms and self-regulation.

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“…This can be seen in the early investigations by Antal et al (2001Antal et al ( , 2003bAntal et al ( , 2004a and in the more recent works showing a high functional specificity of tDCS (Costa et al, 2012(Costa et al, , 2015a. In what concerns clinical research, works like Plow et al (2011Plow et al ( , 2012a and Sunwoo et al (2013), have shown that tDCS can be effectively used in post-stroke rehabilitation of a sensory function (as until recently we only knew cases of tDCS use in post-stroke rehabilitation of motor functions). Taken together, the studies mentioned in this section are a robust example that tDCS is an adequate technique for basic visual research and a promising tool for visual rehabilitation.…”

Section: Visualmentioning

confidence: 97%

“…Future research could use the rationale frequently employed in motor rehabilitation research (i.e., Lindenberg et al, 2013), and take advantage of the fact that tDCS has two electrodes with different functional outcomes that may be used simultaneously to reverse this imbalance (cathode on the hyperactive and anode on the hypoactive site). Sunwoo et al (2013) compared this approach with unilateral stimulation in ten stroke patients with unilateral visuospatial neglect and found the bilateral approach to be significantly more effective.…”

Section: Visualmentioning

confidence: 99%

Transcranial direct current stimulation as a tool in the study of sensory-perceptual processing

Costa

Lapenta

Boggio

et al. 2015

Atten Percept Psychophys

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Transcranial direct current stimulation (tDCS) is a non-invasive neuromodulatory technique with increasing popularity in the fields of basic research and rehabilitation. It is an affordable and safe procedure that is beginning to be used in the clinic, and is a tool with potential to contribute to the understanding of neural mechanisms in the fields of psychology, neuroscience, and medical research. This review presents examples of investigations in the fields of perception, basic sensory processes, and sensory rehabilitation that employed tDCS. We highlight some of the most relevant efforts in this area and discuss possible limitations and gaps in contemporary tDCS research. Topics include the five senses, pain, and multimodal integration. The present work aims to present the state of the art of this field of research and to inspire future investigations of perception using tDCS.

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Effects of dual transcranial direct current stimulation on post-stroke unilateral visuospatial neglect

Cited by 74 publications

References 29 publications

Modulation of attention functions by anodal tDCS on right PPC

Modulation of attention functions by anodal tDCS on right PPC

Increased Alpha-Rhythm Dynamic Range Promotes Recovery from Visuospatial Neglect: A Neurofeedback Study

Transcranial direct current stimulation as a tool in the study of sensory-perceptual processing

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