Real time processing of affective and cognitive stimuli in the human brain extracted from MEG signals

Ioannides, AA, Liu, LC, Theofilou, D, Dammers, J, Burne, T, Ambler, T and Rose, S (2000) Real time processing of affective and cognitive stimuli in the human brain extracted from MEG signals. Brain Topography, 13 1: 11-19. doi:10.1023/A:1007878001388

Author Ioannides, AA
Liu, LC
Theofilou, D
Dammers, J
Burne, T
Ambler, T
Rose, S
Title Real time processing of affective and cognitive stimuli in the human brain extracted from MEG signals
Journal name Brain Topography   Check publisher's open access policy
ISSN 0896-0267
Publication date 2000-09-01
Year available 2000
Sub-type Article (original research)
DOI 10.1023/A:1007878001388
Open Access Status Not yet assessed
Volume 13
Issue 1
Start page 11
End page 19
Total pages 9
Place of publication NEW YORK
Language eng
Abstract The magnetoencephalography (MEG) signal was recorded while subjects watched a video containing separate blocks of effective and cognitive advertisements and recalled slides extracted from the video a day later. An earlier behavioural study using the same video material showed that the affective advertisements were better recalled and that administration of propranolol (a beta-adrenergic blocker) abolished this effect. Magnetic field tomography (MFT) was used to extract tomographic estimates of activity millisecond by millisecond from the continuous MEG signal. Statistically significant differences between affective and cognitive blocks were identified in posterior and prefrontal areas. Cognitive blocks produced stronger activity in posterior parietal areas and superior prefrontal cortex in all three subjects. Affective blocks modulated activity in orbitofrontal and retrosplenial cortex, amygdala and brainstem. Individual contributions to the statistical maps were traced in real time from milliseconds to many seconds. Time-locked responses from the recall session were used to compare average and single trial MFT solutions and to combine activations from all subjects into a common anatomical space. The last step produced statistically significant increases in occipital and inferior ventral cortex between 100 and 200 ms compared to a prestimulus baseline.
Keyword magnetoencephalography (MEG)
orbitofrontal cortex
retrosplenial cortex
superior prefrontal cortex
affective and cognitive stimuli
magnetic field tomography (MFT)
statistical measures
Facial Expressions
Prefrontal Cortex
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
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