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Evidence for enhanced multisensory facilitation with stimulus relevance: an electrophysiological investigation
- Source :
- PLoS ONE, Vol 8, Iss 1, p e52978 (2013), PLoS ONE
- Publication Year :
- 2013
- Publisher :
- Public Library of Science (PLoS), 2013.
-
Abstract
- Currently debate exists relating to the interplay between multisensory processes and bottom-up and top-down influences. However, few studies have looked at neural responses to newly paired audiovisual stimuli that differ in their prescribed relevance. For such newly associated audiovisual stimuli, optimal facilitation of motor actions was observed only when both components of the audiovisual stimuli were targets. Relevant auditory stimuli were found to significantly increase the amplitudes of the event-related potentials at the occipital pole during the first 100 ms post-stimulus onset, though this early integration was not predictive of multisensory facilitation. Activity related to multisensory behavioral facilitation was observed approximately 166 ms post-stimulus, at left central and occipital sites. Furthermore, optimal multisensory facilitation was found to be associated with a latency shift of induced oscillations in the beta range (14-30 Hz) at right hemisphere parietal scalp regions. These findings demonstrate the importance of stimulus relevance to multisensory processing by providing the first evidence that the neural processes underlying multisensory integration are modulated by the relevance of the stimuli being combined. We also provide evidence that such facilitation may be mediated by changes in neural synchronization in occipital and centro-parietal neural populations at early and late stages of neural processing that coincided with stimulus selection, and the preparation and initiation of motor action.
- Subjects :
- Auditory perception
Adult
Male
Adolescent
Visual System
Cognitive Neuroscience
lcsh:Medicine
Electroencephalography
Stimulus (physiology)
Social and Behavioral Sciences
Brain mapping
Motor Reactions
Diagnostic Medicine
Parietal Lobe
medicine
Psychophysics
Reaction Time
Psychology
Humans
lcsh:Science
Biology
Evoked Potentials
Clinical Neurophysiology
Brain Mapping
Multidisciplinary
medicine.diagnostic_test
lcsh:R
Parietal lobe
Multisensory integration
Sensory Systems
Auditory System
Acoustic Stimulation
Facilitation
Auditory Perception
Visual Perception
Medicine
Sensory Perception
Female
lcsh:Q
Occipital Lobe
Evoked Potential
Occipital lobe
Neuroscience
Photic Stimulation
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 8
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....638ad79c82d7f4f5fe34998e54952903