Adaptation changes directional sensitivity in a visual motion-sensitive neuron of the fly
Adaptation changes directional sensitivity in a visual motion-sensitive neuron of the fly
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DOI：
10.1016/j.visres.2008.05.004
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发表时间：
2008-07-01
期刊：
影响因子：
1.8
通讯作者：
Kurtz, Rafael
中科院分区：
文献类型：
--
作者：
Kalb, Julia;Egelhaaf, Martin;Kurtz, Rafael
绿头苍蝇的视觉系统是一个非常适合的模型来研究适应的功能后果。与皮质运动敏感神经元类似，飞切向细胞具有方向选择性，并在长时间刺激期间适应。在这里，我们证明了在一个切向细胞适应后，在一个方向上的运动方向性的大变化。令人惊讶的是，根据刺激参数，相对于未适应方向，适应方向上的运动的灵敏度可以被增强或减弱。一个简单的模型再现了我们的结果。它只结合了先前确定的对比敏感度变化与运动适应。因此，新形式的运动适应似乎没有必要。(c)2008爱思唯尔有限公司保留所有权利。
The blowfly visual system is a well-suited model to investigate the functional consequences of adaptation. Similar to cortical motion-sensitive neurons, fly tangential cells are directional selective and adapt during prolonged stimulation. Here we demonstrate in a tangential cell large changes in directionality after adaptation with motion in one direction. Surprisingly, depending on stimulation parameters, sensitivity for motion in the adapted direction relative to the unadapted direction can be either enhanced or attenuated. A simple model reproduces our results. It only incorporates previously identified changes in contrast sensitivity with motion adaptation. Thus, novel forms of motion adaptation seem unnecessary. (c) 2008 Elsevier Ltd. All rights reserved.