黑腹果蝇光正倾向的习得性抑制。

Eric Le Bourg, Christian Buecher
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引用次数: 62

摘要

设计了一项任务,教个体苍蝇在最初表现出对灯光区域的偏好后避开该区域。果蝇在一个t形迷宫中行走,在一条有光的和一条黑暗的小巷中选择一条,分别通向一个有光的和一个黑暗的小瓶。在第一次试验中呈光阳性的果蝇受到厌恶刺激(将滤纸插入点亮的小瓶中并用奎宁溶液浸湿),它们进行了16次训练试验;他们学会了避开点燃的小瓶。用清水而不是奎宁训练的果蝇仍然表现出对点燃的瓶子的回避,但程度较轻。在点燃的小瓶中使用干燥滤纸进行训练的果蝇在训练过程中没有表现出任何回避的增加。与完全不使用奎宁的果蝇一样,那些在部分强化条件下(一半使用奎宁,另一半使用干燥的瓶子)被训练避开点燃的瓶子的果蝇没有掌握任务。最后,在达到回避获取标准后去除奎宁导致灭绝过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Learned suppression of photopositive tendencies in Drosophila melanogaster.

A task was designed to teach individual flies to avoid a lighted area after they had displayed an initial preference for it. The flies walked in a T-maze and chose between a lighted and a darkened alley leading, respectively, to a lighted and a darkened vial. Flies that were photopositive on a first trial were subjected to an aversive stimulus (a filter paper inserted into the lighted vial and wetted with a quinine solution), and they performed 16 training trials; they learned to avoid the lighted vial. The flies trained with water instead of quinine in the lighted vial still display avoidance of the lighted vial, but to a lesser extent. The flies trained with a dry filter paper in the lighted vial did not show any increase in avoidance during training. Like the flies trained with no quinine at all, those trained to avoid the lighted vial under a partial reinforcement condition (one half of the trials with quinine, the other half with a dry vial) did not master the task. Finally, removal of the quinine after an avoidance acquisition criterion was reached resulted in an extinction process.

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