The role of early stages of cortical visual processing in size and distance judgment: A transcranial direct current stimulation study

Costa, Tássia R.; Costa, Marcelo Fernandes; Magalhães, Adsson; Rêgo, Gabriel Gaudencio; Nagy, Balázs Vince; Boggio, Paulo S.; Ventura, Dora Fix

doi:10.1016/j.neulet.2014.12.055

Cited by 9 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the neural correlates of many visual functions are better known than the ones underlying higher order cognitive functions or the ones underlying most (or all) other senses, visual perception research has also helped us to understand how specific tDCS effects are. 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).…”

Section: Visualmentioning

confidence: 96%

“…In fact, there is some psychophysical evidence supporting this interpretation. First, many studies show changes in thresholds (e.g., Antal et al, 2003a;Grundmann et al, 2011;Costa et al, 2012Costa et al, , 2015a. Some studies have also analyzed tDCS outcomes using a signal detection theory approach.…”

Section: Mechanisms Of Actionmentioning

confidence: 99%

“…These findings suggest that tDCS can have a relevant pathwayspecific effect over the visual cortex but whether this phenomenon was specific for color discrimination or reflected a more general trend towards differential effects of tDCS on different cell groups in the stimulated area was unclear until recently. Costa et al (2015a) have investigated if different spatial frequency channels could be differentially affected by tDCS of the occipital pole. The authors have used psychophysical and electrophysiologic methods and observed a differential effect of tDCS on the responses to different spatial frequencies (i.e., 0.5, 4.0, and 16 cpd) that are known to be processed by different cell groups in the visual cortex.…”

Section: Visualmentioning

confidence: 99%

“…Nonetheless, the anodal effect observed here is an inhibitory one. The authors suggest that since they used a healthy young sample, the auditory cortex function was at a resource ceiling and the specified function had a fine-tuning that was mainly distressed by this artificial modulation (as seen for Vernier processing in Costa et al, 2015a, for instance).…”

Section: Auditorymentioning

confidence: 99%

“…Costa et al (2015a) have evaluated if the threshold and suprathreshold responses to sinusoidal gratings defined by luminance oscillations were similarly affected by tDCS. The authors used visual evoked potentials for this purpose and found a significant tDCS effect only at suprathreshold levels.…”

Section: Multimodal Integrationmentioning

confidence: 99%

See 4 more Smart Citations

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

Costa

Lapenta

Boggio

et al. 2015

Atten Percept Psychophys

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Visualmentioning

confidence: 96%

Section: Mechanisms Of Actionmentioning

confidence: 99%

Section: Visualmentioning

confidence: 99%

Section: Auditorymentioning

confidence: 99%

Section: Multimodal Integrationmentioning

confidence: 99%

See 3 more Smart Citations

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

Costa

Lapenta

Boggio

et al. 2015

Atten Percept Psychophys

Self Cite

View full text Add to dashboard Cite

show abstract

Contrasting effects of transcranial direct current stimulation on central and peripheral visual fields

et al. 2015

View full text Add to dashboard Cite

Recent research suggested that transcranial direct current stimulation (tDCS) can affect visual processing and that it can be useful in visual rehabilitation. Nevertheless, there are still few investigations on the subject. tDCS selectivity and the extent of its outcomes on visual perception are still to be assessed. Here, we investigate whether central and peripheral visual fields are equally affected by tDCS. We also tried to reproduce a previous work that has evaluated tDCS effects on the central visual field only (Kraft et al. 207:283-290, 2010). Fifteen healthy subjects participated in this randomized repeated-measure design study and received 1.5-mA anodal, cathodal and sham stimulation in different sessions, while performing 10-2 and 60-4 protocols in an automated perimeter. Anodal tDCS significantly decreased thresholds, but was limited to the most eccentric regions of the visual field measured (60°). This suggests that tDCS might be used for rehabilitation of peripheral visual field losses. We did not replicate the excitatory tDCS effect in the central visual field as previously reported by another group. Instead, we observed a trend toward an inhibitory (yet not statistically significant) effect of anodal tDCS on the central field. This might be explained by methodological differences. These results highlight that although tDCS is a technique with a low focality in the spatial domain, its effects might be highly focal in a functional domain. When taken together with previous findings, this also suggests that tDCS may have a differential effect on different retinotopic areas in the brain.

show abstract

Perceptual size discrimination requires awareness and late visual areas: A continuous flash suppression and interocular transfer study

Peel

Sherman

Sperandio

et al. 2019

Consciousness and Cognition

View full text Add to dashboard Cite

The role of early stages of cortical visual processing in size and distance judgment: A transcranial direct current stimulation study

Cited by 9 publications

References 27 publications

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

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

Contrasting effects of transcranial direct current stimulation on central and peripheral visual fields

Perceptual size discrimination requires awareness and late visual areas: A continuous flash suppression and interocular transfer study

Contact Info

Product

Resources

About