香りの科学

Removing an ingredient or changing its proportion can reshape a mixture. Experiments in humans and rabbit pups explore perceiving the whole while retaining information about its parts.

After six encounters on separate days, lilac and shampoo became more pleasant. Unpleasant odors and an initially very pleasant scent showed no clear increase.

A study of 10 people with vivid odor-related memories measured recall, PET brain activity, and blood cytokines to explore how these responses were related.

In 14 women, resting-state fMRI tracked lavender exposure and the following two hours. Brain-network changes and perceived relaxation did not tell the same story.

A study of 24 older adults explored how personally meaningful odors relate to memory, comfort, and brain activity, including connections with visual regions.

Stimulation of one nostril sometimes sped responses to visual targets on the same side. Seven experiments explored the timing of this cross-sensory shift.

Mice lacking dorsal olfactory sensory neurons struggled to distinguish mirror-image molecules at concentrations where they could detect an odor, offering clues to the role of sensitive receptor inputs.