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Phosphene Attributes Depend on Frequency and Intensity of Retinal tACS
E. Kvašňák, M. Orendáčová, J. Vránová
Jazyk angličtina Země Česko
Typ dokumentu časopisecké články
Free Medical Journals od 1998
PubMed Central od 2020
ProQuest Central od 2005-01-01
Medline Complete (EBSCOhost) od 2006-01-01
Nursing & Allied Health Database (ProQuest) od 2005-01-01
Health & Medicine (ProQuest) od 2005-01-01
ROAD: Directory of Open Access Scholarly Resources od 1998
Odkazy
PubMed
35770470
DOI
10.33549/physiolres.934887
Knihovny.cz E-zdroje
- MeSH
- fosfeny MeSH
- lidé MeSH
- přímá transkraniální stimulace mozku * MeSH
- retina MeSH
- světelná stimulace metody MeSH
- zrakové korové centrum * fyziologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Phosphene is the experience of light without natural visual stimulation. It can be induced by electrical stimulation of the retina, optic nerve or cortex. Induction of phosphenes can be potentially used in assistive devices for the blind. Analysis of phosphene might be beneficial for practical reasons such as adjustment of transcranial alternating current stimulation (tACS) frequency and intensity to eliminate phosphene perception (e.g., tACS studies using verum tACS group and sham group) or, on the contrary, to maximize perception of phosphenes in order to be more able to study their dynamics. In this study, subjective reports of 50 healthy subjects exposed to different intensities of retinal tACS at 4 different frequencies (6, 10, 20 and 40 Hz) were analyzed. The effectiveness of different tACS frequencies in inducing phosphenes was at least 92 %. Subject reported 41 different phosphene types; the most common were light flashes and light circles. Changing the intensity of stimulation often induced a change in phosphene attributes. Up to nine phosphene attributes changed when the tACS intensity was changed. Significant positive correlation was observed between number of a different phosphene types and tACS frequency. Based on these findings, it can be concluded that tACS is effective in eliciting phosphenes whose type and attributes change depending on the frequency and intensity of tACS. The presented results open new questions for future research.
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