Olfactory bulb habituation to odor stimuli.

Olfactory bulb habituation to odor stimuli.
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DOI:
10.1037/a0020293
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发表时间:
2010-08
影响因子:
1.9
通讯作者:
Linster, Christiane
Linster, Christiane
中科院分区:
医学4区
文献类型:
--
作者:
Chaudhury, Dipesh;Manella, Laura;Arellanos, Adolfo;Escanilla, Olga;Cleland, Thomas A.;Linster, Christiane

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习惯化是记忆的一种简单形式,但它的神经生物学机制在哺乳动物中才刚刚开始被理解。在嗅觉系统中,在涉及非常短的试验间隔(数十秒)的快速实验时间尺度上的习惯化的神经相关性已被证明取决于嗅觉皮层中的突触适应。与此相反,行为习惯的气味在一个较长的时间尺度上与几分钟的间隔取决于过程中的嗅球,药理学研究表明。我们在这里表明,在这个较长的时间尺度上对气味的行为习惯化与嗅球中的神经元活动相关。在大鼠嗅球的二尖瓣细胞的尖峰响应适应,并恢复,重复气味刺激与5分钟的试验间隔与时间过程类似的行为习惯化。此外,气味习惯化的行为和神经效应都需要嗅球中的NMDA受体发挥作用。
Habituation is a simple form of memory, yet its neurobiological mechanisms are only beginning to be understood in mammals. In the olfactory system, the neural correlates of habituation at a fast experimental timescale involving very short intertrial intervals (tens of seconds) have been shown to depend on synaptic adaptation in olfactory cortex. In contrast, behavioral habituation to odorants on a longer timescale with intertrial intervals of several minutes depends on processes in the olfactory bulb, as demonstrated by pharmacological studies. We here show that behavioral habituation to odorants on this longer timescale has a neuronal activity correlate in the olfactory bulb. Spiking responses of mitral cells in the rat olfactory bulb adapt to, and recover from, repeated odorant stimulation with five-minute intertrial intervals with a timecourse similar to that of behavioral habituation. Moreover, both the behavioral and neuronal effects of odor habituation require functioning NMDA receptors in the olfactory bulb.
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