T型水迷路試験における脱出用装置の構造差のSHR, SHRSPの学習行動におよぼす影響

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Several water maze tasks are widely used on behavioral and learning ability tests in teratology studies. The purpose of this study is to investigate the influence of two different types of escape apparatus (mesh type : M group, plastic type : P group) on the learning ability of SHR, SHRSP and WKY rats in the single water T-maze test. A part of the mesh type escape apparatus is put over the water surface in the water maze, whereas the whole plastic escape apparatus is placed under the water. The swimming time with errorless trials of SHR and SHRSP was shorter than that of WKY over all the trials in both M and P groups. In the trials from day 1 to day 3,SHR, SHRSP and WKY showed similar decreases in the means of error counts and increases in the rates of errorless performance. In the trial at day 4 with the goal reversed, the mean of error counts of SHR was smaller as compared to that of WKY. In the rate of errorless performance, each strain showed a similar change in M group, but the rate of SHR was significantly higher than that of WKY in P group. The swimming time of P group was generally shorter than that of M group throughout the trials of 4 days. How- ever, this difference of the swimming time was considered to be due to the difference of the waterway distance by the structural difference of escape apparatus rather than the learning ability itself, since the plastic type waterway is a little shorter than the mesh type. In both M and P groups, the means of error counts and the rates of errorless performance were similar in each strain. Therefore, it may be concluded that no apparent influence of the structural difference of the two escape apparatuses exists in this learning test system.
近畿大学の論文
1987-12-30

T型水迷路試験における脱出用装置の構造差のSHR, SHRSPの学習行動におよぼす影響

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