Decreased BOLD responses in audiovisual processing
| Autor: | Femke de Smit, Lavinia Slabu, Esther Wiersinga-Post, Remco J. Renken, Sonja Tomaskovic, Hendrikus Duifhuis |
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| Přispěvatelé: | Faculteit Medische Wetenschappen/UMCG, Artificial Intelligence |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Male
VISUAL SPEECH-PERCEPTION genetic structures Brain activity and meditation CONSONANTS Neuropsychological Tests CONFUSIONS Attention BRAIN NEURONS media_common Brain Mapping Crossmodal medicine.diagnostic_test General Neuroscience fMRI CAT Middle Aged Magnetic Resonance Imaging inhibition McGurk effect Auditory Perception Evoked Potentials Auditory Visual Perception Female SUPERIOR COLLICULUS Psychology psychological phenomena and processes Adult media_common.quotation_subject Down-Regulation behavioral disciplines and activities audiovisual binding Young Adult Perception CEREBRAL-CORTEX medicine Humans audiovisual integration MULTISENSORY INTEGRATION multimodal Multisensory integration crossmodal Functional imaging sparse sampling Acoustic Stimulation Evoked Potentials Visual human brain imaging Percept Functional magnetic resonance imaging deactivation Neuroscience Photic Stimulation |
| Zdroj: | Neuroreport, 21(18), 1146-1151. LIPPINCOTT WILLIAMS & WILKINS |
| ISSN: | 0959-4965 |
| DOI: | 10.1097/wnr.0b013e328340cc47 |
| Popis: | Audiovisual processing was studied in a functional magnetic resonance imaging study using the McGurk effect. Perceptual responses and the brain activity patterns were measured as a function of audiovisual delay. In several cortical and subcortical brain areas, BOLD responses correlated negatively with the perception of the McGurk effect. No brain areas with positively correlated BOLD responses were found. This was unexpected as most studies of audiovisual integration use additivity and super additivity - that is, increased BOLD responses after audiovisual stimulation compared with auditory-only and visual-only stimulation - as criteria for audiovisual integration. We argue that brain areas that show decreased BOLD responses that correlate with an integrated audiovisual percept should not be neglected from consideration as possibly involved in audiovisual integration. NeuroReport 21: 1146-1151 (C) 2010 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins. |
| Databáze: | OpenAIRE |
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