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演題詳細

Poster

学習・長期記憶
Learning and Long-term Memory

開催日 2014/9/13
時間 11:00 - 12:00
会場 Poster / Exhibition(Event Hall B)

コモンマーモセットにおける図形弁別と逆転学習の成績個体差
Individual difference in performance of pattern discrimination and its reversal learning in common marmosets

  • P3-223
  • 竹本 篤史 / Atsushi Takemoto:1 三輪 美樹 / Miki Miwa:1 木場 礼子 / Reiko Koba:1 山口 智恵子 / Chieko Yamaguchi: 鈴木 比呂美 / Hiromi Suzuki:1 
  • 1:京都大学霊長類研究所 / Cognitive Neuroscience Section, Primate Research Institute, Kyoto University 

Individual difference in performance of pattern discrimination and its reversal learning in common marmosets

Takemoto A, Miwa M, Koba R, Yamaguchi C, Suzuki H, Nakamura K.
Cognitive Neuroscience Section, Primate Research Institute, Kyoto University

Recently, common marmosets have been used extensively in Neuroscience research. Common marmosets are important especially as nonhuman primate models for human diseases. Efficient and stable methods are essential to measure cognitive functions in such models. One convenient and suitable cognitive task for common marmosets is pattern discrimination and its reversal learning. In the pattern discrimination task, a red square appeared as a warning signal at the center of a screen at the beginning of a trial. When the marmoset touched the square, a pair of visual patterns was presented simultaneously to the left and right of the center of the screen. Only one of the patterns was always associated with a reward (S+). If the marmoset correctly touched the S+ pattern, a reward was delivered. However, if the marmoset touched the other pattern (S-), no reward was delivered. In its reversal learning, the reward pattern was opposite that of the preceding task; the former S+ pattern was no longer associated with a reward while the former S- pattern was newly associated with a reward. It has been well known that there are individual differences in various aspects of behavior in common marmosets. However, to date, details of the individual differences are still unclear. So far, we trained more than 30 marmosets in the learning problem. With these data, we quantitatively examined the ratio of the successfully learned marmosets to all the trained marmosets, the numbers of errors to criteria in the first, second, and third problems, etc., and evaluate individual differences among the marmosets.

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