Context-dependent olfactory learning in an insect
Context-dependent olfactory learning in an insect
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DOI：
10.1101/lm.72504
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发表时间：
2004-05-01
影响因子：
2
通讯作者：
Mizunami, M
中科院分区：
文献类型：
--
作者：
Matsumoto, Y;Mizunami, M
我们研究了蟋蟀Gryllus bimaculatus选择一对气味中的一种，并在一种情况下避免另一种，并在另一种情况下做相反的事情的能力。一组蟋蟀被训练在照明下将一对气味（条件刺激，CSI）中的一种与水奖励（食欲非条件刺激，US+）相关联，将另一种气味（CS2）与盐水溶液（厌恶US，US-）相关联，并在黑暗中将CSI与US-相关联，将CS2与US+相关联。另一组蟋蟀接受相反刺激安排的训练。3 cl训练后1 d，在光照条件下，前者对CS 1的偏好显著高于CS2，而在黑暗条件下，前者对CS2的偏好显著高于CSI，而后者则表现出相反的气味偏好。对照实验的结果表明，背景光条件对记忆的形成或提取没有显着影响，除非它是明确地与US在训练过程中。因此，只有当蟋蟀被要求使用它来消除歧义的CS的含义和预测US的视觉环境影响学习性能。
We studied the capability of the cricket Gryllus bimaculatus to select one of a pair of odors and to avoid the other in one context and to do the opposite in another context. One group of crickets was trained to associate one of a pair of odors (conditioned stimulus, CSI) with water reward (appetitive unconditioned stimulus, US+) and another odor (CS2) with saline solution (aversive US, US-) under illumination and to associate CSI with US- and CS2 with US+ in the dark. Another group of crickets received training of the opposite stimulus arrangement. At 1 d after the training for 3 cl, the former group significantly preferred CS1 over CS2 under illumination but preferred CS2 over CSI in the dark, and the latter group exhibited the opposite odor preference. The results of control experiments showed that the background light condition had no significant effects on memory formation or retrieval unless it was explicitly associated with US during training. Thus, the visual context affected learning performance only when crickets were requested to use it to disambiguate the meaning of CSs and to predict USs.