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Activity Number:
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531
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Type:
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Topic Contributed
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Date/Time:
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Thursday, August 2, 2007 : 10:30 AM to 12:20 PM
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Sponsor:
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ENAR
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| Abstract - #309568 |
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Title:
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A Structural Equation Model for fMRI Data with Mixed Functional and Discrete Responses
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Author(s):
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Wesley Thompson*+
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Companies:
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University of Pittsburgh
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Address:
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6476 Monitor Street, Pittsburgh, PA, 15217,
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Keywords:
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fMRI experiment ; functional linear models ; SEM ; effective connectivity
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Abstract:
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In fMRI effective connectivity analyses, a common question is how two or more regions of interest (ROIs) within the brain interact with each other to process a given experimental task; it may be of interest to determine how differing levels of activation or connectivity in the ROIs affects success or failure in the completion of the task. Conversely, how a subject performs on the task may in turn affect future activation levels in the ROIs. In this talk I develop a structural equation model where some of the outcomes are discrete (success/failure) and some of the outcomes are functional (BOLD activation levels in ROIs over time). This model is applied to data obtained from an event-related fMRI working memory experiment designed to determine brain correlates of cognitive control and emotional reactivity to errors in performing tasks.
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- The address information is for the authors that have a + after their name.
- Authors who are presenting talks have a * after their name.
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