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Rapid visual categorization learning without lateral prefrontal cortex in monkeys
https://repo.qst.go.jp/records/69662
https://repo.qst.go.jp/records/69662078d8866-a9b8-4408-a6ae-56cf355ea6b4
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-12-19 | |||||
| タイトル | ||||||
| タイトル | Rapid visual categorization learning without lateral prefrontal cortex in monkeys | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Minamimoto, Takafumi
× Minamimoto, Takafumi× et.al× 南本 敬史 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Lateral prefrontal cortex (LPFC) is thought to be involved in learning of visual categorization mainly because its neuronal activity to a visual stimulus can be differentiated relative to the visual category of the stimulus. To assess cognitive skills in animal studies, people usually use the behavioral tasks with executive control of action (e.g. choice of action), in which LPFC is likely to be involved. Is LPFC essential for learning of visual categorization? Here we reassessed LPFC function in learning of visual categories by using a behavioral task that did not require choice of action. We trained 4 rhesus monkeys in a instrumental task where a visually-triggered bar- release was required in every trial. A visual cue presented at the beginning of each trial indicated one of two rewarding conditions: a reward would be either immediately delivered or postponed (7s) after the correct bar release. When each visual cue of a categorical cue set was associated with a rewarding condition (e.g. dog = immediate; cat = postponed), the monkeys clearly discriminated the categories as demonstrated by different error rates (p<0.001, X2-test) even as early as the first day. After bilateral removal of LPFC, the monkeys still were capable of discriminating categories as the different error rates between categories with both learned (e.g. dogs/cats) and novel categories (e.g. cars/trucks). Furthermore, the monkeys generalized the association to trial-unique categorical cues with different error rates. These results indicate that LPFC is not essential for learning of visual categories and generalization to novel stimuli. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 38th Annual Meeting of Society for Neuroscience | |||||
| 発表年月日 | ||||||
| 日付 | 2008-11-19 | |||||
| 日付タイプ | Issued | |||||
