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カミンブロッキング効果における腹側被蓋野及び側坐核の機能解
https://doi.org/10.15102/1394.00001053
https://doi.org/10.15102/1394.00001053ef564a60-4ff4-42fd-907f-fdbdf899e613
名前 / ファイル | ライセンス | アクション |
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20200116_Thesis_CorrectedFinalVersion_Mayank (3.8 MB)
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Final_Exam_Abstract (42.9 kB)
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Item type | 学位論文 / Thesis or Dissertation(1) | |||||||
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公開日 | 2019-12-27 | |||||||
タイトル | ||||||||
言語 | ja | |||||||
タイトル | カミンブロッキング効果における腹側被蓋野及び側坐核の機能解 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | The Role of Ventral Tegmental Area and Nucleus Accumbens in the Kamin Blocking Effect | |||||||
言語 | ||||||||
言語 | eng | |||||||
資源タイプ | ||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
資源タイプ | doctoral thesis | |||||||
ID登録 | ||||||||
ID登録 | 10.15102/1394.00001053 | |||||||
ID登録タイプ | JaLC | |||||||
アクセス権 | ||||||||
アクセス権 | open access | |||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
著者 (英) |
Aggarwal, Mayank
× Aggarwal, Mayank
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抄録 | ||||||||
内容記述タイプ | Abstract | |||||||
内容記述 | The overall aim of the research described in this thesis is to identify neural substrates underlying the Kamin blocking effect. This phenomenon is crucial for understanding of the neural mechanisms of associative learning. Kamin blocking refers to the finding that conditioned responding to a cue is attenuated when it is paired with a reinforcer in the presence of another cue which has previously been conditioned using that reinforcer. The blocking effect suggests that associative learning is driven by prediction errors, and is not based purely on temporal contiguity between events. In the context of appetitive classical conditioning, recent evidence suggests that the ventral tegmental area and the nucleus accumbens play a role in computing reward prediction error. The current study shows that blocking inhibition in the ventral tegmental area or inactivating the nucleus accumbens neurons during compound cue conditioning attenuates Kamin blocking. Inactivating the nucleus accumbens during single cue conditioning also attenuates Kamin blocking. Taken together, these findings suggest that inhibition in the ventral tegmental area, inhibitory output from the nucleus accumbens, and learning in the nucleus accumbens play crucial roles in the Kamin blocking effect. Previous studies show that dopamine transients track the theoretical reward prediction error during appetitive classical conditioning, and the reduction in the dopamine response evoked by the reward when it is expected has been suggested to play a role in the Kamin blocking effect. In support of this hypothesis, the current study also found that goal tracking rats, in which expected rewards have previously been shown to evoke a robust dopamine response, did not express the Kamin blocking effect. Conversely, sign trackers, in which expected rewards evoke a diminished dopamine response, expressed the blocking effect. These findings are discussed in relation to psychological theory of learning and the possible underlying neural mechanisms. | |||||||
言語 | en | |||||||
口頭試問日 | ||||||||
2019-10-08 | ||||||||
学位授与年月日 | ||||||||
学位授与年月日 | 2019-11-30 | |||||||
学位名 | ||||||||
学位名 | Doctor of Philosophy | |||||||
学位授与番号 | ||||||||
学位授与番号 | 甲第40号 | |||||||
学位授与機関 | ||||||||
学位授与機関識別子Scheme | kakenhi | |||||||
学位授与機関識別子 | 38005 | |||||||
学位授与機関名 | Okinawa Institute of Science and Technology Graduate University | |||||||
著者版フラグ | ||||||||
出版タイプ | VoR | |||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
権利 | ||||||||
権利情報 | © 2019 The Author. |