thesis presentation 2014 final
TRANSCRIPT
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IntroductionIntroduction• Investigate the impacts of aging on the
anterior cingulate cortex
• Determine age differences in ACC activation through EEG collection during a modified Stroop task and ICA
• Predicted that the grand average ERPs, ERSP, and GFA for the ACC IC would differ between younger and older adults
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Anterior Cingulate CortexAnterior Cingulate Cortex
• Medial-frontal lobe
• Executive functions,emotion, and physiology
• Relation to research
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Literature ReviewLiterature Review• Mager et al. (2007) - Age-related changes in
cognitive conflict processing: An event-related potential study
• Mathewson et al. (2008) - Aging and electrocortical response to error feedback during a spatial learning task
• West (2004) – The effects of aging on controlled attention and conflict processing in the Stroop task
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MethodsMethods
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ACC Component ACC Component ClassificationClassification
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ACC TopographiesACC Topographies
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Grand Average ERP Grand Average ERP ComparisonComparison
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ACC Component ERSP Z-ACC Component ERSP Z-ScoresScores
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ACC Component ERSP Z-ACC Component ERSP Z-ScoresScores
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ACC Component Power ACC Component Power DifferenceDifference
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Global Field AmplitudeGlobal Field Amplitude
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GFA Z-Scores and Group GFA Z-Scores and Group DifferenceDifference
Group Time (ms) Z-score
Younger 74.22 -3.905
Older 91.80 1.310
Difference 72.27 -6.721
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Summary & DiscussionSummary & Discussion• ACC component responded differently
to making correct responses versus errors, and differed between groups
• Power and global field amplitude generated by the ACC component was significantly greater in younger adults
• Suggests that the ACC component produces less and more diffuse electrical activity with advancing age
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Future DirectionsFuture Directions• Applying the ICA approach to the Memory,
Super Memory, and monetary incentive components of the modified Stroop task
• Compare the results of the ACC component to performance and respiratory sinus arrhythmia (RSA) data
• Engaging the ACC through alternative modalities
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