INFLUENCE OF SHORT-TERM EXPOSURE OF MAGNETIC-FIELD ON THE BIOELECTRICAL PROCESSES OF THE BRAIN AND PERFORMANCE

Citation
E. Lyskov et al., INFLUENCE OF SHORT-TERM EXPOSURE OF MAGNETIC-FIELD ON THE BIOELECTRICAL PROCESSES OF THE BRAIN AND PERFORMANCE, International journal of psychophysiology, 14(3), 1993, pp. 227-231
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Psychology, Experimental",Psychology,Neurosciences,Physiology
ISSN journal
0167-8760
Volume
14
Issue
3
Year of publication
1993
Pages
227 - 231
Database
ISI
SICI code
0167-8760(1993)14:3<227:IOSEOM>2.0.ZU;2-Z
Abstract
The influence of an extremely-low-frequency (ELF) magnetic field on th e bioelectrical processes of brain and performance was studied by EEG spectral analysis, auditory-evoked potentials (AEP), reaction time (RT ) and target-deletion test (TDT). Fourteen volunteers were exposed for 15 min to an intermittent (1 s on/off) 45-Hz magnetic field at 1000 A /m (1.26 mT). Each person received one real and one sham exposure. Sta tistically significant increases in spectral power through alpha- and beta-bands, as well as in mean frequency of the EEG spectrum were obse rved after magnetic field exposure. Field-dependent changes of N100 we re also revealed. No changes in the amplitudes or latencies of the ear lier peaks were observed. No direct effects on RT, nor on TDT performa nce were seen. However, practice effects on RT (decrease of RT in the course of the test-sessions) seemed to be interrupted by exposure to t he magnetic field.