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Related Experiment Videos

Olfactomotor activity during imagery mimics that during perception.

Moustafa Bensafi1, Jessica Porter, Sandra Pouliot

  • 1Helen Wills Neuroscience Institute, University of California at Berkeley, 3210 Tolman Hall MC 1650, Berkeley, California 94720, USA. bensafi@uclink.berkeley.edu

Nature Neuroscience
|October 21, 2003
PubMed
Summary

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Mental imagery can involve sensorimotor reenactment. Olfactory imagery uniquely involves spontaneous sniffing, with larger sniffs for pleasant odors, suggesting sniffing aids olfactory perception.

Area of Science:

  • Cognitive Neuroscience
  • Sensory Perception
  • Olfactory Processing

Background:

  • Neural representations without external stimuli are called imagery.
  • Sensorimotor processes can augment mental imagery.
  • The motor component of olfaction is sniffing.

Purpose of the Study:

  • To investigate sensorimotor reenactment during different types of mental imagery.
  • To determine if sniffing occurs during olfactory imagery.
  • To explore the functional role of sniffing in olfactory imagery.

Main Methods:

  • Measuring nasal airflow in human subjects.
  • Subjects engaged in imagery of sights, sounds, and smells.
  • Analyzing sniffing behavior during olfactory imagery.

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Main Results:

  • Spontaneous sniffing occurred only during olfactory imagery.
  • Imagery of pleasant odors elicited larger sniffs than unpleasant odors.
  • Sniffing magnitude correlated with odor pleasantness during imagery.

Conclusions:

  • The motor act of sniffing is intrinsically linked to olfactory imagery.
  • Sniffing appears to play a functional role in generating olfactory percepts.
  • Findings suggest a shared mechanism between olfactory perception and imagery.