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http://hdl.handle.net/1903/1871
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| Title: | CORTICAL DYNAMICS OF AUDITORY-VISUAL SPEECH: A FORWARD MODEL OF MULTISENSORY INTEGRATION. |
| Authors: | van Wassenhove, Virginie |
| Advisors: | Poeppel, David
Grant, Ken W. |
| Department/Program: | Neuroscience and Cognitive Science |
| Type: | Dissertation |
| Sponsors: | Digital Repository at the University of Maryland
University of Maryland (College Park, Md.) |
| Keywords: | Biology, Neuroscience (0317)
Speech Communication (0459)
Language, Linguistics (0290)
multisensory, speech, analysis-by-synthesis, forward model, electroencephalography, time |
| Issue Date: | 30-Aug-2004 |
| Abstract: | In noisy settings, seeing the interlocutor's face helps to disambiguate what is being said. For this to happen, the brain must integrate auditory and visual information. Three major problems are (1) bringing together separate sensory streams of information, (2) extracting auditory and visual speech information, and (3) identifying this information as a unified auditory-visual percept. In this dissertation, a new representational framework for auditory visual (AV) speech integration is offered. The experimental work (psychophysics and electrophysiology (EEG)) suggests specific neural mechanisms for solving problems (1), (2), and (3) that are consistent with a (forward) 'analysis-by-synthesis' view of AV speech integration.
In Chapter I, multisensory perception and integration are reviewed. A unified conceptual framework serves as background for the study of AV speech integration.
In Chapter II, psychophysics testing the perception of desynchronized AV speech inputs show the existen... |
| URI: | http://hdl.handle.net/1903/1871 |
| Appears in Collections: | Biology Theses and Dissertations
UM Theses and Dissertations
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| umi-umd-1680.pdf | | 3430Kb | Adobe PDF | 597 | View/Open |
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