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Study Reveals Human Sense of Smell is Faster Than Previously Thought

New research shows humans can distinguish odor sequences within milliseconds, challenging long-held beliefs about olfactory processing speed.

Blond senior woman with eyes closed smelling fresh yellow tulip flowers at home
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Participants’ ability to distinguish the odors improved with longer delays between the compounds and did not depend on knowing the correct order. Credit: Neuroscience News

Overview

  • Researchers developed a device that delivers two scents with millisecond precision, allowing for precise control over odor presentation.
  • The study involved 229 participants who could discern between two odors presented in quick succession, with a latency as short as 60 milliseconds.
  • Findings suggest that the human sense of smell operates at a speed comparable to color perception, refuting the idea that olfaction is a slow sense.
  • The study opens possibilities for therapeutic applications, such as olfactory training for patients with smell loss, and advancements in electronic noses.
  • Further research is needed to explore the sensitivity of the human sense of smell to a broader range of odor dynamics and compounds.