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Bursts of occipital theta and alpha amplitude preceding alternation and repetition trials in a task-switching experiment
- Source :
- Biological Psychology, 68(3), 309-329. ELSEVIER SCIENCE BV
- Publication Year :
- 2005
-
Abstract
- The instantaneous amplitude of the theta and alpha bands of the electroencephalogram (EEG) was studied during preparation periods in a task-switching experiment. Subjects had to switch between tasks in which they were to respond to either the visual or the auditory component of the stimulus. 11-13 Hz occipital amplitude increased prior to auditory, relative to visual repetition trials. The effect was transient, ending well before presentation of the stimulus that was being prepared for. Alternation trials were preceded by an increase in occipital theta-band activity, relative to repetition trials, for the visual task. This effect was also transient. The effects suggest tentative hypotheses for the function of transient bursts of alpha- and theta-band oscillations and indicate the possibility of a psychophysiological resolution of theoretical questions concerning the origin of switch costs. (C) 2004 Elsevier B.V. All rights reserved.
- Subjects :
- Adult
Male
Task switching
Periodicity
CORTEX
alpha
genetic structures
Adolescent
Photic Stimulation
PHASE
SPATIAL ATTENTION
INHIBITION
Electroencephalography
Stimulus (physiology)
switch costs
ACTIVATION
WORKING-MEMORY
Task Performance and Analysis
medicine
OSCILLATIONS
Humans
EEG
Theta Rhythm
medicine.diagnostic_test
Working memory
General Neuroscience
DESYNCHRONIZATION
Visual task
Reproducibility of Results
task switching
Electrophysiology
Alpha Rhythm
Neuropsychology and Physiological Psychology
Amplitude
Acoustic Stimulation
theta
SYNCHRONIZATION
Female
modality
Psychology
Neuroscience
Subjects
Details
- Language :
- English
- ISSN :
- 03010511
- Volume :
- 68
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Biological Psychology
- Accession number :
- edsair.doi.dedup.....6c8085447332478e62812a461e006bff