Effects of repetitive transcranial magnetic stimulation and transcranial direct current stimulation on posterior alpha wave

Dilok Puanhvuan, Kazuhisa Nojima, Yodchanan Wongsawat, Keiji Iramina

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Because of the unclear conclusion of the repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS) effects on the posterior electroencephalogram (EEG) alpha wave, this study is aimed at investigating these unclear effects. Transcranial stimulation effects are observed by analyzing a measured EEG at the occipital area between prestimulation and the poststimulation. The EEG alpha power and alpha coherence are calculated and analyzed in terms of the ratio between eyes closed and eyes open periods. The results reveal that alpha power ratio at the individual alpha frequency (IAF) significantly increases after the 1-Hz rTMS and cathodal tDCS and slightly decreases after the anodal tDCS compared to the control and the sham conditions. The results also show that there is a significant difference between the inhibited and excited conditions. Similarities are observed in the patterns of the alpha coherence ratio and alpha power changes. The alpha coherence increases in the rTMS and cathodal tDCS conditions, and decreases in the anodal tDCS condition but these effects occur only when comparing across the hemispheres (O1-O2 and P3-P4). It can be summarized that the EEG alpha wave can be influenced by the transcranial stimulations. The rTMS and cathodal tDCS seem to facilitate the alpha activity and the anodal tDCS inhibits it.

Original languageEnglish
Pages (from-to)263-268
Number of pages6
JournalIEEJ Transactions on Electrical and Electronic Engineering
Volume8
Issue number3
DOIs
Publication statusPublished - May 2013

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Effects of repetitive transcranial magnetic stimulation and transcranial direct current stimulation on posterior alpha wave'. Together they form a unique fingerprint.

  • Cite this