EEG modification induced by repetitive transcranial magnetic stimulation

Citation
H. Okamura et al., EEG modification induced by repetitive transcranial magnetic stimulation, J CL NEURPH, 18(4), 2001, pp. 318-325
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Neurology
Journal title
JOURNAL OF CLINICAL NEUROPHYSIOLOGY
ISSN journal
0736-0258 → ACNP
Volume
18
Issue
4
Year of publication
2001
Pages
318 - 325
Database
ISI
SICI code
0736-0258(200107)18:4<318:EMIBRT>2.0.ZU;2-V
Abstract
Repetitive transcranial magnetic stimulation (rTMS) is a powerful, noninvas ive tool for investigating cortical physiologic functions in the brain. How ever, EEG spectral analysis has not been investigated extensively in rTMS s tudy. The authors investigated the influence of rTMS on the EEG power spect rum by stimulating the left frontal cortex in 32 healthy subjects. Stimulat ion parameters were a 10-Hz frequency, a 3-second duration, and a 100% moto r threshold. The data showed that rTMS increased the peak frequency of EEG across the scalp within 2 minutes after stimulation, whereas the value decr eased at 3 to 4 minutes. The mean absolute powers within 3 minutes after rT MS did not differ from those estimated before rTMS, but increased uniformly at 4 to 5 minutes, The spectra did not change after sham stimulation. Thes e results indicate that rTMS can influence cortical activities significantl y by increasing the frequency and amplitude of EEG, and is a useful tool fo r helping us understand brain functions.