Humans can discriminate more than 1 trillion olfactory stimuli.

Humans can discriminate more than 1 trillion olfactory stimuli.
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DOI:
10.1126/science.1249168
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发表时间:
2014-03-21
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Keller A
Keller A
中科院分区:
其他
文献类型:
--
作者:
Bushdid C;Magnasco MO;Vosshall LB;Keller A

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人类可以分辨数百万种不同的颜色和近50万种不同的音调,但可辨别的嗅觉刺激的数量仍然未知。科学文献通常声称人类可以辨别10,000种气味,但这个数字从未得到经验验证。在这里,我们通过测试人类区分具有不同数量共享组分的气味混合物的能力来确定人类嗅觉的分辨率。根据心理物理测试的结果,我们计算出人类至少可以分辨出1万亿种嗅觉刺激。这远远超过了以前对可区分的嗅觉刺激的估计。它表明,人类的嗅觉系统,其数百种不同的嗅觉受体,远远超过其他感官的数量不同的刺激,它可以区分。
Humans can discriminate several million different colors and almost half a million different tones, but the number of discriminable olfactory stimuli remains unknown. The lay and scientific literature typically claims that humans can discriminate 10,000 odors, but this number has never been empirically validated. Here, we determined the resolution of the human sense of smell by testing the capacity of humans to discriminate odor mixtures with varying numbers of shared components. Based on the results of psychophysical testing, we calculated that humans can discriminate at least one trillion olfactory stimuli. This is far more than previous estimates of distinguishable olfactory stimuli. It demonstrates that the human olfactory system, with its hundreds of different olfactory receptors, far outperforms the other senses in the number of physically different stimuli it can discriminate.
DOI: 10.1038/nmeth.1197
发表时间: 2008-05-01
期刊: NATURE METHODS
影响因子: 48
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