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The role of the prefrontal cortex an...

Moustafa, Ahmed A.

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The role of the prefrontal cortex and the basal ganglia in delayed-response task performance: A neural model.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The role of the prefrontal cortex and the basal ganglia in delayed-response task performance: A neural model./
Author:	Moustafa, Ahmed A.
Description:	172 p.
Notes:	Adviser: Anthony S. Maida.
Contained By:	Dissertation Abstracts International67-05B.
Subject:	Biology, Neuroscience. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3220070
ISBN:	9780542706479

The role of the prefrontal cortex and the basal ganglia in delayed-response task performance: A neural model.
Moustafa, Ahmed A.

The role of the prefrontal cortex and the basal ganglia in delayed-response task performance: A neural model. - 172 p.

Adviser: Anthony S. Maida.

Thesis (Ph.D.)--University of Louisiana at Lafayette, 2006.

Delayed-response tasks (DRTs) have been used to assess working memory (WM) processes in human and nonhuman animals. Experimental studies showed that the basal ganglia and prefrontal cortex (PFC) subserve DRT performance. We hypothesize that the basal ganglia subserve selection of both motor- and cognitive-related information (i.e., the uniform selection hypothesis) to perform these tasks. We propose an Actor-Critic model (where the matrisomes represent the Actor and the striosomes represent the Critic) that simulates reward-based acquisition of these functions. The model incorporates both closed- and open-loop pathways between the basal ganglia and dorsolateral prefrontal cortex (DLPFC). The purpose is to respectively select task-relevant cognitive information to be maintained in WM and also to select appropriate motor responses. Training for both types of functions is based on the temporal difference algorithm.

ISBN: 9780542706479Subjects--Topical Terms:

1017680
Biology, Neuroscience.

The role of the prefrontal cortex and the basal ganglia in delayed-response task performance: A neural model.
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100 1 $a Moustafa, Ahmed A. $3 1296431
245 1 4 $a The role of the prefrontal cortex and the basal ganglia in delayed-response task performance: A neural model.
300 $a 172 p.
500 $a Adviser: Anthony S. Maida.
500 $a Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2394.
502 $a Thesis (Ph.D.)--University of Louisiana at Lafayette, 2006.
520 $a Delayed-response tasks (DRTs) have been used to assess working memory (WM) processes in human and nonhuman animals. Experimental studies showed that the basal ganglia and prefrontal cortex (PFC) subserve DRT performance. We hypothesize that the basal ganglia subserve selection of both motor- and cognitive-related information (i.e., the uniform selection hypothesis) to perform these tasks. We propose an Actor-Critic model (where the matrisomes represent the Actor and the striosomes represent the Critic) that simulates reward-based acquisition of these functions. The model incorporates both closed- and open-loop pathways between the basal ganglia and dorsolateral prefrontal cortex (DLPFC). The purpose is to respectively select task-relevant cognitive information to be maintained in WM and also to select appropriate motor responses. Training for both types of functions is based on the temporal difference algorithm.
520 $a A novel feature of the model is the incorporation of delay-active neurons in the striatum (as well as DLPFC). Another novel feature of the model is the subdivision of the matrisomal neurons into delay- versus transiently-active for respectively maintaining cognitive information and selecting motor actions.
520 $a The model accounts for DRT performance, as evidenced by tracking the changes in connection strength during learning. Further, the significance of the uniform selection hypothesis is tested against some lesioning and reward-based behavioral studies related to WM processes of the basal ganglia and DLPFC.
590 $a School code: 1363.
650 4 $a Biology, Neuroscience. $3 1017680
650 4 $a Psychology, Cognitive. $3 1017810
690 $a 0317
690 $a 0633
710 2 0 $a University of Louisiana at Lafayette. $3 1025962
773 0 $t Dissertation Abstracts International $g 67-05B.
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790 1 0 $a Maida, Anthony S., $e advisor
791 $a Ph.D.
792 $a 2006
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