图 书 馆
自上而下的控制机制，工作记忆容量Mechanism for Top-down Control of Working Memory Capacity |
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| 课程网址: | http://videolectures.net/eccs08_compte_mftdcowmc/ |
| 主讲教师: | Albert Compte |
| 开课单位: | IDIBAPS公司 |
| 开课时间: | 2008-10-17 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Working memory relies on the activation of both prefrontal and parietal cortex, possibly with prefrontal cortex exerting top-down control. However, there is still no mechanistic description of either capacity limitations or top-down control of maintenance of information in working memory. Here, we propose that lateral inhibition in parietal cortex limits mnemonic capacity. However, at high loads, this inhibition can be counteracted by excitatory input from prefrontal cortex, thus boosting parietal capacity. We formulate this computationally in a biophysical cortical microcircuit model, and conceptualize it in a mathematical equation. Predictions from the model were confirmed in an fMRI study. The model provides a mechanistic framework for understanding top-down control of working memory, and specifies two different contributions of prefrontal and parietal cortex to working memory capacity. |
| 关 键 词: | 额叶和顶叶皮层; 自上而下的控制; 侧抑制记忆容量限制 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-10-14：yumf |
| 阅读次数: | 71 |