東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

The neural circuitry of reward expec...

Ramirez, Donna Renee.

FindBook

Google Book

Amazon

博客來

The neural circuitry of reward expectancies produced by the Differential Outcomes Procedure.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	The neural circuitry of reward expectancies produced by the Differential Outcomes Procedure./
作者:	Ramirez, Donna Renee.
面頁冊數:	91 p.
附註:	Adviser: Lisa M. Savage.
Contained By:	Dissertation Abstracts International67-04B.
標題:	Psychology, Physiological. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3214764
ISBN:	9780542644245

The neural circuitry of reward expectancies produced by the Differential Outcomes Procedure.
Ramirez, Donna Renee.

The neural circuitry of reward expectancies produced by the Differential Outcomes Procedure. - 91 p.

Adviser: Lisa M. Savage.

Thesis (Ph.D.)--State University of New York at Binghamton, 2006.

Expectations of different rewards are known to have powerful effects on learning and performance. Reward expectancies are the result of learned associations between a neutral cue and a reward that facilitate the formation of internal representations of future situations. Learned expectations about the occurrence of future events are valuable in forming associations that provide more accurate predictive information, thus directing future behavior more effectively. The Differential Outcomes Procedure (DOP) is a manipulation of reward contingencies that modifies the cognitive strategy/brain region used on conditional discrimination tasks. Implementation of the DOP enhances learning and memory performance through a predictive relationship between each unique to-be-remembered event with a distinct reward condition. This use of specific reward expectancies is not present when a common or randomized reward procedure is used (Nondifferential Outcomes Procedure [NOP]). Recent findings indicate that parts of the extended amygdala such as the basolateral amygdala (BLA), orbitofrontal cortex (OFC), and nucleus accumbens (NuAc) are critical for the formation of reward expectancies. The present experiment was aimed at delineating the individual as well as the interactive role of the Fornix, BLA, OFC, and NuAc on conditional discrimination tasks with (DOP) and without (NOP) the use of reward expectancies. This was accomplished using pre-training lesions of specific neural regions involved in reward expectancies followed by training on a conditional discrimination task with and without the DOP. Rats with lesions to the BLA, OFC, or NuAc did not display the prototypical differential outcomes effect (DOE) as compared to sham and fornix lesioned rats. BLA lesions resulted in decreased ability to use the reward expectancies during acquisition; OFC lesions resulted in impairment in later maintenance. However, NuAc lesions enhanced the DOE on this task. Taken together, lesions of the BLA, OFC, and NuAc affected the expression of the DOE, although each in a different manner. These data provide further support for the thesis that implementing the DOP into a conditional discrimination task alters the both the cognitive strategy and brain regions utilized.

ISBN: 9780542644245Subjects--Topical Terms:

1017869
Psychology, Physiological.

The neural circuitry of reward expectancies produced by the Differential Outcomes Procedure.
LDR:03183nam 2200277 a 45 001 972415
005 20110927
008 110927s2006 eng d
020 $a 9780542644245
035 $a (UMI)AAI3214764
035 $a AAI3214764
040 $a UMI $c UMI
100 1 $a Ramirez, Donna Renee. $3 1296422
245 1 4 $a The neural circuitry of reward expectancies produced by the Differential Outcomes Procedure.
300 $a 91 p.
500 $a Adviser: Lisa M. Savage.
500 $a Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2272.
502 $a Thesis (Ph.D.)--State University of New York at Binghamton, 2006.
520 $a Expectations of different rewards are known to have powerful effects on learning and performance. Reward expectancies are the result of learned associations between a neutral cue and a reward that facilitate the formation of internal representations of future situations. Learned expectations about the occurrence of future events are valuable in forming associations that provide more accurate predictive information, thus directing future behavior more effectively. The Differential Outcomes Procedure (DOP) is a manipulation of reward contingencies that modifies the cognitive strategy/brain region used on conditional discrimination tasks. Implementation of the DOP enhances learning and memory performance through a predictive relationship between each unique to-be-remembered event with a distinct reward condition. This use of specific reward expectancies is not present when a common or randomized reward procedure is used (Nondifferential Outcomes Procedure [NOP]). Recent findings indicate that parts of the extended amygdala such as the basolateral amygdala (BLA), orbitofrontal cortex (OFC), and nucleus accumbens (NuAc) are critical for the formation of reward expectancies. The present experiment was aimed at delineating the individual as well as the interactive role of the Fornix, BLA, OFC, and NuAc on conditional discrimination tasks with (DOP) and without (NOP) the use of reward expectancies. This was accomplished using pre-training lesions of specific neural regions involved in reward expectancies followed by training on a conditional discrimination task with and without the DOP. Rats with lesions to the BLA, OFC, or NuAc did not display the prototypical differential outcomes effect (DOE) as compared to sham and fornix lesioned rats. BLA lesions resulted in decreased ability to use the reward expectancies during acquisition; OFC lesions resulted in impairment in later maintenance. However, NuAc lesions enhanced the DOE on this task. Taken together, lesions of the BLA, OFC, and NuAc affected the expression of the DOE, although each in a different manner. These data provide further support for the thesis that implementing the DOP into a conditional discrimination task alters the both the cognitive strategy and brain regions utilized.
590 $a School code: 0792.
650 4 $a Psychology, Physiological. $3 1017869
650 4 $a Psychology, Psychobiology. $3 1017821
690 $a 0349
690 $a 0989
710 2 0 $a State University of New York at Binghamton. $3 737493
773 0 $t Dissertation Abstracts International $g 67-04B.
790 $a 0792
790 1 0 $a Savage, Lisa M., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3214764