Olfactomotor activity during imagery mimics that during perception

@article{Bensafi2003OlfactomotorAD,
  title={Olfactomotor activity during imagery mimics that during perception},
  author={Moustafa Bensafi and Jessica Porter and Sandra Pouliot and Joel D. Mainland and Brad Johnson and Christina Maria Zelano and Natasha Young and Elizabeth A Bremner and Danny Aframian and Rehan M. Khan and Noam Sobel},
  journal={Nature Neuroscience},
  year={2003},
  volume={6},
  pages={1142-1144}
}
Neural representations created in the absence of external sensory stimuli are referred to as imagery, and such representations may be augmented by reenactment of sensorimotor processes. We measured nasal airflow in human subjects while they imagined sights, sounds and smells, and only during olfactory imagery did subjects spontaneously enact the motor component of olfaction—that is, they sniffed. Moreover, as in perception, imagery of pleasant odors involved larger sniffs than imagery of… 

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