图 书 馆
多巴胺2型受体控制从知觉推理到强化学习的反向温度βDopamine type 2 receptors control inverse temperature beta for transition from perceptual inference to reinforcement learning |
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| 课程网址: | http://videolectures.net/rldm2015_lee_reinforcement_learning/ |
| 主讲教师: | Eunjeong Lee |
| 开课单位: | 国家精神卫生研究所 |
| 开课时间: | 2015-07-28 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Decisions are based on a combination of immediate perception and previous experience. If the mapping between actions and outcomes in a context is unpredictable over time, decisions must be made on the basis of immediately available information. Alternatively, if action-outcome mappings can be learned by reinforcement, then this information can be combined with immediately available information. Previous neurophysiological results suggest that frontal-striatal circuits may be involved in the interaction between these processes. The role of dopamine, however, has not been examined directly. We injected locally dopamine type 1 (D1A; SCH23390) or type 2 (D2A; Eticlopride) antagonists or saline into the dorsal striatum while macaques performed an oculomotor sequential decision making task. Choices in the task were driven by perceptual inference and/or reinforcement of past choices. We found that the D2A affected decisions based on previous outcomes. When we fit Rescorla-Wagner models, the inverse temperature decreased after D2A injections into the dorsal striatum compared with a pre-injection period. We found that neither the D1A nor saline injections affected behavior. Overall, our results suggest D2Rs in the striatum control the inverse temperature in reinforcement learning. |
| 关 键 词: | 强化学习; 多巴胺; 反向温度 |
| 课程来源: | 视频讲座网 |
| 数据采集: | 2021-11-28：zkj |
| 最后编审: | 2021-11-28：zkj |
| 阅读次数: | 67 |