从分子到意识：关于气味强度的综合视角
From molecule to mind: an integrative perspective on odor intensity.
作者信息
Mainland Joel D, Lundström Johan N, Reisert Johannes, Lowe Graeme
机构信息
Monell Chemical Senses Center, Philadelphia, PA, USA; Department of Neuroscience, University of Pennsylvania, Philadelphia, PA, USA.
Monell Chemical Senses Center, Philadelphia, PA, USA; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Psychology, University of Pennsylvania, Philadelphia, PA, USA.
出版信息
Trends Neurosci. 2014 Aug;37(8):443-54. doi: 10.1016/j.tins.2014.05.005. Epub 2014 Jun 17.
A fundamental problem in systems neuroscience is mapping the physical properties of a stimulus to perceptual characteristics. In vision, wavelength translates into color; in audition, frequency translates into pitch. Although odorant concentration is a key feature of olfactory stimuli, we do not know how concentration is translated into perceived intensity by the olfactory system. A variety of neural responses at several levels of processing have been reported to vary with odorant concentration, suggesting specific coding models. However, it remains unclear which, if any, of these phenomena underlie the perception of odor intensity. Here, we provide an overview of current models at different stages of olfactory processing, and identify promising avenues for future research.
系统神经科学中的一个基本问题是将刺激的物理特性映射到感知特征上。在视觉中，波长转化为颜色；在听觉中，频率转化为音高。虽然气味浓度是嗅觉刺激的一个关键特征，但我们不知道嗅觉系统是如何将浓度转化为感知强度的。据报道，在几个处理层次上的各种神经反应会随气味浓度而变化，这表明存在特定的编码模型。然而，目前尚不清楚这些现象中哪些（如果有的话）构成了气味强度感知的基础。在这里，我们概述了嗅觉处理不同阶段的当前模型，并确定了未来研究的有前景的途径。
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