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:
影响因子:
--
通讯作者:
Keller A
中科院分区:
文献类型:
--
作者:
Bushdid C;Magnasco MO;Vosshall LB;Keller A
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.
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