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Odor mixture perception: can molecular complexity be a factor determining elemental or configural perception?
bioRxiv - Neuroscience Pub Date : 2020-05-30 , DOI: 10.1101/2020.05.27.120154
Masayuki Hamakawa , Hiroya Ishikawa , Yumika Kikuchi , Kaori Tamura , Tsuyoshi Okamoto

Odor mixtures can evoke smells that differ from those of their individual odor components. Research has revealed the existence of two perceptual modes, in which a mixture can be perceived as either the original smells of its individual components (elemental) or as a novel smell (configural). However, the factors underlying the perceptual transformation that occurs when smelling a mixture versus its original components remain unclear. Therefore, the present study aimed to identify the properties of odorants that affect olfactory perception of odor mixtures, focusing on the structural complexity of an odorant. We conducted psychophysical experiments in which different groups of participants were instructed to provide olfactory perceptual descriptions of low-, medium-, and high-complexity odor mixtures or components, respectively. To investigate the perceptual modes induced by the mixtures, we compared the participants' evaluations between mixtures and components via two types of analyses. First, we compared each olfactory description following quantification via principal component analysis. We then compared data based on seven major olfactory perceptual groups. We observed that odor mixtures composed of low-complexity odorants were perceived as relatively novel smells with regard to both minor (olfactory descriptions) and major (perceptual community) odor qualities than medium- and high-complexity mixtures. Such information may further our understanding of the olfactory perceptual modes of odor mixtures.

中文翻译:

气味混合感知:分子复杂性是否可以成为决定元素或构象感知的因素?

异味混合物会散发出不同于其各自异味成分的异味。研究表明存在两种感知模式,在这种模式下,混合物可以被感知为单个成分的原始气味(元素)或新颖的气味(结构性)。但是,尚不清楚在闻到混合物及其原始成分时发生的知觉转变的潜在因素。因此,本研究旨在确定影响气味混合物嗅觉的气味剂的性能,着重于气味剂的结构复杂性。我们进行了心理物理实验,其中指示不同组的参与者分别对低,中和高复杂度的气味混合物或成分提供嗅觉感知描述。为了研究混合物引起的感知模式,我们通过两种类型的分析比较了参与者对混合物和组分之间的评价。首先,我们通过主成分分析对量化后的每个嗅觉描述进行了比较。然后,我们根据七个主要的嗅觉知觉组比较了数据。我们观察到,与中,高复杂度混合物相比,就低(嗅觉描述)和主要(感知社区)气味质量而言,由低复杂度气味剂组成的气味混合物被认为是相对较新的气味。这些信息可能会进一步加深我们对气味混合物的嗅觉感知模式的理解。我们通过主成分分析对量化后的每个嗅觉描述进行了比较。然后,我们根据七个主要的嗅觉知觉组比较了数据。我们观察到,与中,高复杂度混合物相比,就低(嗅觉描述)和主要(感知社区)气味质量而言,由低复杂度气味剂组成的气味混合物被认为是相对较新的气味。这些信息可能会进一步加深我们对气味混合物的嗅觉感知模式的理解。我们通过主成分分析对量化后的每个嗅觉描述进行了比较。然后,我们根据七个主要的嗅觉知觉组比较了数据。我们观察到,与中,高复杂度混合物相比,就低(嗅觉描述)和主要(感知社区)气味质量而言,由低复杂度气味剂组成的气味混合物被认为是相对较新的气味。这些信息可能会进一步加深我们对气味混合物的嗅觉感知模式的理解。我们观察到,与中,高复杂度混合物相比,就低(嗅觉描述)和主要(感知社区)气味质量而言,由低复杂度气味剂组成的气味混合物被认为是相对较新的气味。这些信息可能会进一步加深我们对气味混合物的嗅觉感知模式的理解。我们观察到,与中,高复杂度混合物相比,就低(嗅觉描述)和主要(感知社区)气味质量而言,由低复杂度气味剂组成的气味混合物被认为是相对较新的气味。这些信息可能会进一步加深我们对气味混合物的嗅觉感知模式的理解。
更新日期:2020-05-30
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