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Change-driven cortical activation in multisensory environments: an MEG study.
- Source :
-
NeuroImage [Neuroimage] 2009 Nov 01; Vol. 48 (2), pp. 464-74. Date of Electronic Publication: 2009 Jun 25. - Publication Year :
- 2009
-
Abstract
- The quick detection of dynamic changes in multisensory environments is essential to survive dangerous events and orient attention to informative events. Previous studies have identified multimodal cortical areas activated by changes of visual, auditory, and tactile stimuli. In the present study, we used magnetoencephalography (MEG) to examine time-varying cortical processes responsive to unexpected unimodal changes during continuous multisensory stimulation. The results showed that there were change-driven cortical responses in multimodal areas, such as the temporo-parietal junction and middle and inferior frontal gyri, regardless of the sensory modalities where the change occurred. These multimodal activations accompanied unimodal activations, both of which in general had some peaks within 300 ms after the changes. Thus, neural processes responsive to unimodal changes in the multisensory environment are distributed at different timing in these cortical areas.
- Subjects :
- Acoustic Stimulation
Adult
Analysis of Variance
Brain Mapping
Environment
Evoked Potentials
Female
Humans
Magnetoencephalography
Male
Middle Aged
Photic Stimulation
Physical Stimulation
Time Factors
Young Adult
Auditory Perception physiology
Brain physiology
Signal Detection, Psychological physiology
Touch Perception physiology
Visual Perception physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1095-9572
- Volume :
- 48
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- NeuroImage
- Publication Type :
- Academic Journal
- Accession number :
- 19559795
- Full Text :
- https://doi.org/10.1016/j.neuroimage.2009.06.037