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Evaluation of cognitive function in adult rhesus monkeys using the finger maze test

By Keonwoo Kim, Hyeon-Ae Jeon, Jincheol Seo, Junghyung Park, Jinyoung Won, Hyeon-Gu Yeo, Chang-Yeop Jeon, Jae-Won Huh, Young-Hyun Kim, Yonggeun Hong, Ji-Woong Choi, Youngjeon Lee

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Abstract

In research on cognitive function, the use of experimental animals is essential for the study of human cognitive processes and mechanisms. Furthermore, non-human primates are necessary for understanding higher cognitive functions in humans. However, there are few cognitive function tests available for non-human primates, Thus, we modified a finger maze test for application to non-human primates. In this study, we assessed learning and memory in 12 adult rhesus monkeys using a finger maze test that was developed to assess cognitive functions in captive non-human primates. The monkeys were trained with moving rewards indicating the correct direction, which allowed the monkeys to obtain the reward. Following training, subjects completed a learning trial and a memory trial two months later. Although the time required for training varied among the monkeys, 11 out of 12 monkeys completed the training and achieved a high success rate in the learning trial as well as in the memory trial conducted 2 months later. This is the first study to apply the finger maze test to adult rhesus monkeys. The finger maze test enabled us to assess learning and memory in several adult rhesus monkeys simultaneously.

Publication Title Applied Animal Behaviour Science
Volume 224
Pages 104945
ISBN/ISSN 0168-1591
DOI https://doi.org/10.1016/j.applanim.2020.104945
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Tags
  1. Cognition
  2. Mazes
  3. Monkeys
  4. tests