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Anterior cingulate cortex, medial fr...

Sutherland, Matthew Thomas.

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Anterior cingulate cortex, medial frontal negativity and preceding context: Assessing an EEG-based neural correlate of performance monitoring during a Stroop task.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Anterior cingulate cortex, medial frontal negativity and preceding context: Assessing an EEG-based neural correlate of performance monitoring during a Stroop task./
作者:	Sutherland, Matthew Thomas.
面頁冊數:	116 p.
附註:	Adviser: Akaysha Tang.
Contained By:	Dissertation Abstracts International68-12B.
標題:	Psychology, Experimental. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295508
ISBN:	9780549402169

Anterior cingulate cortex, medial frontal negativity and preceding context: Assessing an EEG-based neural correlate of performance monitoring during a Stroop task.
Sutherland, Matthew Thomas.

Anterior cingulate cortex, medial frontal negativity and preceding context: Assessing an EEG-based neural correlate of performance monitoring during a Stroop task. - 116 p.

Adviser: Akaysha Tang.

Thesis (Ph.D.)--The University of New Mexico, 2007.

Flexible goal-directed behavior requires a system that is to adapt to changing task demands and contexts. Current models suggest that anterior cingulate cortex (ACC) activity may serve a performance monitoring function that tracks when behavior may deviate from desired goals. Frontal-midline EEG activity, particularly in the form of negative deflections in event-related brain potentials (ERPs), has been considered to reflect aspects of ACC functioning and performance monitoring. In the current study, a medial frontal negativity observed shortly after correct responses, termed the correct-related negativity (CRN), is assessed during performance of a uniquely modified Stroop color-identification task. In a Stroop task, the two dimensions of a stimulus can he either compatible (C) or incompatible (I) (C: the word "RED" in red hue; I: the word "RED" in blue hue). The reaction time difference between I and C trials (the interference effect) has been shown to depend upon the context in which the trial is delivered (e.g., the compatibility-level of the preceding trial). In the present task, context was manipulated not only by the compatibility-level of the preceding trial but also by the number of preceding-trials before an ending-trial of interest. EEG data were collected during task performance and processed with a blind source separation (BSS) algorithm to extract frontal-midline activity from other neural processes and artifactual signals. The CRN observed in the response-locked ERPs computed from frontal-midline component activations was found to be affected by the task contextual manipulations. The modulation of the CRN amplitude appeared to be inconsistent with expectations formulated from the conflict-monitoring hypothesis.

ISBN: 9780549402169Subjects--Topical Terms:

517106
Psychology, Experimental.

Anterior cingulate cortex, medial frontal negativity and preceding context: Assessing an EEG-based neural correlate of performance monitoring during a Stroop task.
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