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Transfer of Odor Perception From the Retronasal to the Orthonasal Pathway
Chemical Senses ( IF 3.5 ) Pub Date : 2020-11-16 , DOI: 10.1093/chemse/bjaa074
Rui He 1, 2 , Talicia C Dukes 2, 3 , Leslie M Kay 1, 2
Affiliation  

Although orthonasal odorants are often associated with the external environment, retronasal odorants are accompanied by consummatory behaviors and indicate an internal state of an animal. Our study aimed to examine whether the same odorants may generate a consistent perceptual experience when 2 olfactory routes potentiate variations in concentration in the nasal cavity and orosensory activation. A customized lick spout with vacuum removing odorants around the animal’s nares was used to render a pure retronasal exposure experience. We found that pre-exposing rats to odorants retronasally with positive or negative reinforcers (sweet or bitter) lead to a significant learning rate difference between high- and low-vapor-pressure odorants. This effect was not observed for novel odorants, suggesting that odorants may generate similar perceptual quality in a volatility-dependent manner.

中文翻译:

气味感知从后鼻腔到鼻腔通路的转移

虽然鼻后气味通常与外部环境有关,但鼻后气味伴随着完善的行为并表明动物的内部状态。我们的研究旨在检查当 2 种嗅觉途径增强鼻腔中的浓度变化和口觉激活时,相同的气味剂是否会产生一致的感知体验。使用带有真空去除动物鼻孔周围气味的定制舔嘴来呈现纯粹的鼻后暴露体验。我们发现,将大鼠鼻后预先暴露于带有正或负增强剂(甜味或苦味)的气味剂会导致高蒸汽压气味剂和低蒸汽压气味剂之间的学习率存在显着差异。对于新型气味剂,没有观察到这种效果,
更新日期:2020-11-16
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