Transcranial Direct Current Stimulation Modulates Human Color Discrimination in a Pathway-Specific Manner
Bibliographic Data
| ID | 15519695 |
|---|---|
| Authors | Thiago Leiros Costa (Universidade de São Paulo, corresponding author), Balázs Vince Nagy (0000-0002-8489-7200, Universidade de São Paulo), Mirella Telles Salgueiro Barboni (0000-0002-0717-1852, Universidade de São Paulo), Paulo Sérgio Boggio (0000-0002-6109-0447, Universidade Presbiteriana Mackenzie), Dora Fix Ventura (0000-0002-7616-4031, Universidade de São Paulo) |
| Year | 2012 |
| Volume | 3 |
| Pages | 78-78 |
| Publication date | 2012-01-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Frontiers in Psychiatry (JOURNAL) |
| Journal identifiers | ISSN: 1664-0640 • E-ISSN: 1664-0640 |
| Publisher | Frontiers Media (PUBLISHER • CH) |
| DOI | 10.3389/fpsyt.2012.00078 |
| PMID | 22988446 |
| PMCID | PMC3439847 |
| OpenAlex | W2136178116 |
| Language | EN |
| Citations received | 1 |
| References cited | 1 |
Previous research showed that transcranial direct current stimulation (tDCS) can modulate visual cortex excitability. However, there is no experiment on the effects of tDCS on color perception to date. The present study aimed to investigate the effects of tDCS on color discrimination tasks. Fifteen healthy subjects (mean age of 25.6 ± 4.4 years) were tested with Cambridge Color Test 2.0 (Trivector and ellipses protocols) and a Forced-choice Spatial Color Contrast Sensitivity task (vertical red-green sinusoidal grating) while receiving tDCS. Anodal, cathodal, and sham tDCS were delivered at Oz for 22 min using two square electrodes (25 cm(2) with a current of 1.5 mA) in sessions separated by 7 days. Anodal tDCS significantly increased tritan sensitivity (p < 0.01) and had no significant effect on protan, deutan, or red-green grating discrimination. The effects on the tritan discrimination returned to baseline after 15 min (p < 0.01). Cathodal tDCS reduced the sensitivity in the deutan axis and increased sensitivity in the tritan axis (p < 0.05). The lack of anodal tDCS effects in the protan, deutan, and red-green grating sensitivities could be explained by a "ceiling effect" since adults in this age range tend to have optimal color discrimination performance for these hues. The differential effects of cathodal tDCS on tritan and deutan sensitivities and the absence of the proposed ceiling effects for the tritan axes might be explained by Parvocellular (P) and Koniocellular (K) systems with regard to their functional, physiological, and anatomical differences. The results also support the existence of a systematic segregation of P and K color-coding cells in V1. Future research and possible clinical implications are discussed
Audiology · Color vision · Optics · Physics · Stimulation · Transcranial Direct Current Stimulation · Medicine · Neural and Behavioral Psychology Studies · Neuroscience · Psychology · Transcranial Magnetic Stimulation Studies · Vestibular and auditory disorders
| Unique citing works | 1 |
|---|---|
| Citations per year | 0,08 |
| Citation span | 2013 - 2013 (1) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 1 |