Multisensory Integration of Sounds and Vibrotactile Stimuli in Processing Streams for 'What' and 'Where'
| Autor: | John W. VanMeter, Laurent Renier, Irina Anurova, Josef P. Rauschecker, Synnöve Carlson, Anne De Volder |
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| Přispěvatelé: | UCL - MD/FSIO - Département de physiologie et pharmacologie |
| Rok vydání: | 2009 |
| Předmět: |
Adult
Male Sound localization Auditory perception Vibration Article Functional Laterality Stimulus modality Parietal Lobe medicine Humans Sound Localization medicine.diagnostic_test General Neuroscience Parietal lobe Multisensory integration Inferior parietal lobule Middle Aged Magnetic Resonance Imaging Acoustic Stimulation Touch Auditory Perception Female Psychology Functional magnetic resonance imaging Insula Neuroscience psychological phenomena and processes Cognitive psychology |
| Zdroj: | The Journal of Neuroscience, Vol. 29, no. 35, p. 10950-60 (2009) |
| ISSN: | 1529-2401 0270-6474 |
| Popis: | The segregation between cortical pathways for the identification and localization of objects is thought of as a general organizational principle in the brain. Yet, little is known about the unimodal versus multimodal nature of these processing streams. The main purpose of the present study was to test whether the auditory and tactile dual pathways converged into specialized multisensory brain areas. We used functional magnetic resonance imaging (fMRI) to compare directly in the same subjects the brain activation related to localization and identification of comparable auditory and vibrotactile stimuli. Results indicate that the right inferior frontal gyrus (IFG) and both left and right insula were more activated during identification conditions than during localization in both touch and audition. The reverse dissociation was found for the left and right inferior parietal lobules (IPL), the left superior parietal lobule (SPL) and the right precuneus-SPL, which were all more activated during localization conditions in the two modalities. We propose that specialized areas in the right IFG and the left and right insula are multisensory operators for the processing of stimulus identity whereas parts of the left and right IPL and SPL are specialized for the processing of spatial attributes independently of sensory modality. |
| Databáze: | OpenAIRE |
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