dc.contributor.advisor | 廖瑞銘 | zh_TW |
dc.contributor.author (作者) | 林緯倫 | zh_TW |
dc.contributor.author (作者) | Lin, Wea Lun | en_US |
dc.creator (作者) | 林緯倫 | zh_TW |
dc.creator (作者) | Lin, Wea Lun | en_US |
dc.date (日期) | 2007 | en_US |
dc.date.accessioned | 17-九月-2009 13:13:53 (UTC+8) | - |
dc.date.available | 17-九月-2009 13:13:53 (UTC+8) | - |
dc.date.issued (上傳時間) | 17-九月-2009 13:13:53 (UTC+8) | - |
dc.identifier (其他 識別碼) | G0093752001 | en_US |
dc.identifier.uri (URI) | https://nccur.lib.nccu.edu.tw/handle/140.119/32484 | - |
dc.description (描述) | 碩士 | zh_TW |
dc.description (描述) | 國立政治大學 | zh_TW |
dc.description (描述) | 心理學研究所 | zh_TW |
dc.description (描述) | 93752001 | zh_TW |
dc.description (描述) | 96 | zh_TW |
dc.description.abstract (摘要) | 很多行為的建構基礎是來自酬賞動機,而個體的行為表現通常是動態的歷程,其中對酬賞物的“價值”比較,是決定行為是否輸出或輸出多少的重要關鍵。在鼠類的動物行為模式中,可以利用甜液舔飲來進行這種對比(contrast)歷程的實驗。在受試可先後獲得兩次舔飲機會的實驗情境中,若兩管濃度皆為4%的蔗糖液先後間隔特定時距出現,受試會隨訓練天數增加而增加對兩管糖液的舔飲表現。若第一管4%蔗糖液之後會呈現濃度較高的32%蔗糖液,受試舔飲第一管同為濃度4%蔗糖液的表現會隨訓練天數增加而先增後減。這兩組受試對第一管糖液的舔飲量差異,即稱為預期性對比效果。一般認為此現象是受試等待與預期較高酬賞價值的糖液,而抑制當前較低酬賞價值糖液的舔飲。過去對此現象的研究主要關注在行為層面的探討,然而其相關神經機制的研究並不多,本研究的目的即在於探討與習得或形成預期性對比行為有關的神經機制。一般認為預期性對比效果的習得包含多階段的歷程,可能與多種心理行為面向有關,因此很有可能是經由多元性的神經機制參與。預期性對比效果的形成與否與兩糖液呈現的間距長短有很大的關係。本研究實驗一以0.5分鐘、2分鐘以及6分鐘三個不同的糖液間距引發的預期對比效果,從當中選取可有效形成預期性對比效果的0.5分鐘為實驗二糖液間距的依據。實驗二分別以興奮性神經毒素破壞依核核心區、眶前額皮質區以及杏仁體基側核區等三個神經區域。結果顯示杏仁核基側核區破壞不影響預期性對比效果的習得,而依核核心區以及眶前額皮質的破壞使受試無法習得預期性對比效果。綜合以上結果,預期性對比效果的習得是依靠有效的糖液呈現間距去進行酬賞比較,腦中依核核心區及眶前額皮質區與該種對比有關。 | zh_TW |
dc.description.abstract (摘要) | Many types of behavior are constructed on the basis of reward motivation, which can be run in dynamic processes. Among those processes potentially involved, the reward comparison is a key determinant for the magnitude of behavioral output. The licking of sweet solution in the rat can be used as an animal model to investigate the contrast effect derived from reward comparison. In which, the subjects presented two sweet solutions in a sequential order each day may suppress intake of the first solution if the second solution is preferred. This phenomenon is termed anticipatory contrast effect (ACE). It is hypothesized that ACE could be built via an inhibition process associated with subject’s waiting for a preferred solution as presented by a less preferred solution. Most of the previous studies were mainly focused on the behavioral aspects of ACE. The present study intended to investigate the neural mechanisms of ACE. In considering that the formation of ACE requires multiple-stage processes, this study presumed that more than one brain area could be involved in mediating those psycho-behavioral processes. Experiment 1 was intended to establish behavioral model by manipulating the effectiveness of different inter-solution interval (ISI; 0.5, 2.0, and 6.0 min). The results showed that the ISI of 0.5 min is the critical parameters for the successful formation of ACE, which was then applied in Experiment 2. Experiment 2 investigated the effects of excitotoxin lesion conducted by ibotenic acid in the nucleus accumbens core (NACc), orbitofrontal cortex (OFC) or basolateral amygdala (BLA) on the acquisition of ACE. The result showed the rats with NACc or OFC lesion significantly failed to acquire ACE, but no such impairment appeared to BLA lesion. Together, these data suggest that the formation of ACE is depended upon the ISI leading to an effective reward comparison, and the NACc or OFC is involved in such a contrast processing. | en_US |
dc.description.tableofcontents | 目錄……………………………………………………………………… i圖目錄…………………………………………………………………ii中文摘要……………………………………………………………………… 1英文摘要……………………………………………………………………… 2第一章 研究背景…………………………………………………………… 4一、 前言 …………………………………………………………… 4二、 對比效果 ……………………………………………………… 4三、 預期性對比效果 ……………………………………………… 6(一) 酬賞物的相對價值 ……………………………………… 6(二) 甜液體刺激間距 ………………………………………… 7(三) 糖液呈現的時間長度………………………………………8四、 預期性對比效果的行為內涵 ………………………………… 9五、 預期性對比效果的神經機制之相關研究 …………………… 9六、 研究問題……………………………………………………… 13第二章 研究方法…………………………………………………………15一、 受試……………………………………………………………15二、 藥物……………………………………………………………15三、 儀器……………………………………………………………15四、 統計考驗……………………………………………………… 16第三章 實驗一 …………………………………………………………… 17步驟 ……………………………………………………………… 17結果 ……………………………………………………………… 18討論 ……………………………………………………………… 20第四章 實驗二 …………………………………………………………… 22步驟 ……………………………………………………………… 22手術 ……………………………………………………………… 22組織切片與染色…………………………………………………… 23結果 ………………………………………………………………24討論…………………………………………………………………29第五章 綜合討論……………………………………………………………30參考文獻 …………………………………………………………………… 42附圖說明 ……………………………………………………………………49附圖(圖一至圖十一) ……………………………………………………… 52 | zh_TW |
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dc.language.iso | en_US | - |
dc.source.uri (資料來源) | http://thesis.lib.nccu.edu.tw/record/#G0093752001 | en_US |
dc.subject (關鍵詞) | 預期性對比效果 | zh_TW |
dc.subject (關鍵詞) | 延宕折扣 | zh_TW |
dc.subject (關鍵詞) | 依核核心區 | zh_TW |
dc.subject (關鍵詞) | 眶前額皮質區 | zh_TW |
dc.subject (關鍵詞) | 杏仁體基側核區 | zh_TW |
dc.subject (關鍵詞) | anticipatory contrast effect | en_US |
dc.subject (關鍵詞) | delay discounting | en_US |
dc.subject (關鍵詞) | nucleus accumbens core | en_US |
dc.subject (關鍵詞) | orbitofrontal cortex | en_US |
dc.subject (關鍵詞) | basolateral amygdala | en_US |
dc.title (題名) | 探討預期性對比效果之神經機制 | zh_TW |
dc.title (題名) | Investigation of the neural mechanisms of anticipatory contrast effect | en_US |
dc.type (資料類型) | thesis | en |
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