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

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dc.contributor.authorCosta T.L.
dc.contributor.authorGualtieri M.
dc.contributor.authorBarboni M.T.S.
dc.contributor.authorKatayama R.K.
dc.contributor.authorBoggio P.S.
dc.contributor.authorVentura D.F.
dc.date.accessioned2024-03-13T00:57:16Z
dc.date.available2024-03-13T00:57:16Z
dc.date.issued2015
dc.description.abstract© 2015, Springer-Verlag Berlin Heidelberg.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.
dc.description.firstpage1391
dc.description.issuenumber5
dc.description.lastpage1397
dc.description.volume233
dc.identifier.doi10.1007/s00221-015-4213-0
dc.identifier.issn1432-1106
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36202
dc.relation.ispartofExperimental Brain Research
dc.rightsAcesso Restrito
dc.subject.otherlanguageBrain stimulation
dc.subject.otherlanguagePerimetry
dc.subject.otherlanguageSelectivity
dc.subject.otherlanguagetDCS
dc.subject.otherlanguageVisual field
dc.titleContrasting effects of transcranial direct current stimulation on central and peripheral visual fields
dc.typeArtigo
local.scopus.citations15
local.scopus.eid2-s2.0-84925337144
local.scopus.subjectAdult
local.scopus.subjectAnalysis of Variance
local.scopus.subjectFemale
local.scopus.subjectHumans
local.scopus.subjectMale
local.scopus.subjectSingle-Blind Method
local.scopus.subjectTranscranial Direct Current Stimulation
local.scopus.subjectVisual Field Tests
local.scopus.subjectVisual Fields
local.scopus.subjectYoung Adult
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84925337144&origin=inward
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