2002年
Deterioration in learning and memory of inferential tasks for evaluation of transitivity and symmetry in aged SAMP8 mice
Hippocampus
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- 巻
- 12
- 号
- 6
- 開始ページ
- 803
- 終了ページ
- 810
- 記述言語
- 英語
- 掲載種別
- 書評論文,書評,文献紹介等
- DOI
- 10.1002/hipo.10046
This study examined age-dependent deficits in the learning and memory of inferential tasks, using an established senescence-accelerated mouse model in age-related brain dysfunction (SAMP8) and its genetically related inbred strain (SAMR1). The mice learned two sets of nonspatial odor-odor pairs by association learning successively (i.e., A→B, X→Y, then B→C, Y→ Z). They were tested in transitive inference (i.e., A→>
C, X→ Z) and symmetrical inference (i.e., C→B, Z→Y). In the probe test of A→C, X→>
Z transitive inference, 1-month-old SAMP8 and control SAMR1 at the same age significantly chose the alternative based on transitive inference, but 4- and 7-month-old SAMP8 performed at a random chance level, in comparison with unambiguous inference by control SAMR1 at the same ages. During the test of C→B, Z→Y symmetrical inference, SAMP8 at 1 month of age made errors as frequently as control SAMR1 at the same age, but SAMP8 at 4 and 7 months of age made more errors than SAMR1 at the same ages. At 4 and 7 months of age, SAMP8 made more errors than 1-month-old SAMP8. Control SAMR1 did not show such an age-related deficient. These results indicate that SAMP8 mice have age-related learning and memory deficits in the ability to perform inferential tasks. Age-related hippocampal dysfunction is suggested to be the cause of these age-related deficits in old SAMP8 mice during the performance of inferential tasks mediated by declarative memory. © 2002 Wiley-Liss, Inc.
C, X→ Z) and symmetrical inference (i.e., C→B, Z→Y). In the probe test of A→C, X→>
Z transitive inference, 1-month-old SAMP8 and control SAMR1 at the same age significantly chose the alternative based on transitive inference, but 4- and 7-month-old SAMP8 performed at a random chance level, in comparison with unambiguous inference by control SAMR1 at the same ages. During the test of C→B, Z→Y symmetrical inference, SAMP8 at 1 month of age made errors as frequently as control SAMR1 at the same age, but SAMP8 at 4 and 7 months of age made more errors than SAMR1 at the same ages. At 4 and 7 months of age, SAMP8 made more errors than 1-month-old SAMP8. Control SAMR1 did not show such an age-related deficient. These results indicate that SAMP8 mice have age-related learning and memory deficits in the ability to perform inferential tasks. Age-related hippocampal dysfunction is suggested to be the cause of these age-related deficits in old SAMP8 mice during the performance of inferential tasks mediated by declarative memory. © 2002 Wiley-Liss, Inc.
- ID情報
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- DOI : 10.1002/hipo.10046
- ISSN : 1050-9631
- PubMed ID : 12542231
- SCOPUS ID : 0036956968