Temporal-frontal network underlying pre-attentive change detection: A lagged correlation path model of the event-related optical signal (EROS)
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1
University of Illinois at Urbana Champaign, United States
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2
National University of Singapore, Singapore
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3
University of Helsinki, Finland
Event-related potential (ERP), magnetic encephalogram (MEG), and functional magnetic resonance imaging (fMRI) studies suggest that a temporal-frontal network is involved in pre-attentive change detection. The event-related optical signal (EROS) is an excellent tool to study the temporal dynamics of this putative network because it provides measures of neural activity with high temporal (milliseconds) and spatial (millimeters) resolution. In our previous EROS experiments, which used mean amplitude measures of the optical signal across participants, we consistently found a sequence of temporal and frontal cortex activations. However, we could not unequivocally conclude that the activation pattern was a consequence of temporal cortex activity preceding frontal cortex activity in all participants. In the present study, we applied a lagged correlation path model (a type of dynamic structural equation model - SEM) to study the correlation of temporal and frontal activations across time in the EROS data. The data was obtained in a typical MMN paradigm. Standard sounds (75 ms in duration) and infrequent deviant sounds (4% each; 15 ms - large deviant, 25 ms - medium deviant, and 35 ms - small deviant) were presented via headphones while the participants (N = 32) watched a video. Statistical brain maps of EROS results suggested temporal-frontal, frontal-temporal-frontal, and temporal-frontal activation sequences in large, medium, and small deviant conditions, respectively. Further analysis by lagged correlation path modeling revealed that the sequential activation patterns were found reliably across participants. The present results suggest that the activation of the temporal-frontal network is dynamically modulated depending on the magnitude of the sound change.
Conference:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications, Budapest, Hungary, 4 Apr - 7 Apr, 2009.
Presentation Type:
Poster Presentation
Topic:
Poster Presentations
Citation:
Tse
CY,
Ng
EK,
Rinne
T and
Penney
TB
(2009). Temporal-frontal network underlying pre-attentive change detection: A lagged correlation path model of the event-related optical signal (EROS).
Conference Abstract:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications.
doi: 10.3389/conf.neuro.09.2009.05.097
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Received:
26 Mar 2009;
Published Online:
26 Mar 2009.
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Correspondence:
Chun Y Tse, University of Illinois at Urbana Champaign, Urbana, United States, ctse2@uiuc.edu