RT journal article
T1 Reduction of EEG power during expectancy periods in humans
A1 Gómez-González, CM
A1 Vaquero-Casares, E
A1 López-Mendoza, D
A1 González Rosa, Javier Jesús
A1 Vázquez Marrufo, Manuel
A2 Psicología
K1 EEG
K1 expectancy
K1 oscillatory activity
K1 theta
K1 beta
K1 gamma
K1 correlational method
AB The contingent negative variation (CNV), and the associated event-related desynchronization (ERD) on motor areas and sensory areas, and increase of alpha in the ipsilateral to the cued stimulus side, are different brain signals that reflect motor, sensory, and cognitive activations related to the expectancy of the next stimulus. However, the possibility of an overall change in EEG oscillatory activity during expectancy periods has not been directly addressed. The present report tests whether the background oscillatory activity is modulated by a warning signal. During the expectancy period, the power spectral density (PSD) between 0 and 42.9 Hz--including delta, theta, alpha, beta, and gamma--decreased with respect to the baseline. These results suggest that during expectancy periods there is a generalised decrease in the oscillatory activity, and that reduction of the EEG power would facilitate the phasic and oscillatory neural activities triggered by the next target stimulus.
PB NENCKI INST EXPERIMENTAL BIOLOGY
SN 0065-1400
YR 2004
FD 2004-11-01
LK http://hdl.handle.net/10498/30694
UL http://hdl.handle.net/10498/30694
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026