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Differential human electrodermal responses to odours.

Per Møller1, Garmt Dijksterhuis

  • 1Sensory Science Group, Royal Veterinary and Agricultural University, Rolighedsvej 30, DK-1958, Frederiksberg C, Denmark. pem@kvl.dk

Neuroscience Letters
|July 11, 2003
PubMed
Summary
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This study investigated olfactory responses using electrodermal recordings. Unpleasant odors did not consistently elicit larger skin conductance responses than pleasant ones, and emotional responses appear ipsilaterally governed.

Area of Science:

  • Neuroscience
  • Psychology
  • Olfactory System Research

Background:

  • The olfactory system evaluates odor pleasantness, crucial for autonomic nervous system activity.
  • Electrodermal recordings (skin conductance) are proposed for studying olfactory affective processes.
  • Previous hypotheses suggested contralateral control of skin conductance and larger responses to unpleasant odors.

Purpose of the Study:

  • To investigate differential skin conductance responses to pleasant and unpleasant odors.
  • To test the hypothesis of contralateral control over skin conductance.
  • To determine if unpleasant odors elicit greater skin conductance responses than pleasant odors.

Main Methods:

  • Subjects were exposed to iso-intense, non-trigeminal pleasant and unpleasant odors.

Related Experiment Videos

  • Skin conductance changes were measured on both hands during odor exposure.
  • Electrodermal activity was analyzed to assess autonomic nervous system responses.

    • Main Results:

    • Differential skin conductance responses were observed for various odors.
    • No significant difference was found in skin conductance responses between pleasant and unpleasant odors.
    • Evidence did not support contralateral governance of skin conductance.

    Conclusions:

    • The olfactory system exhibits varied electrodermal responses to different odors.
    • Unpleasant odors do not universally produce larger skin conductance responses than pleasant odors.
    • Data suggest an ipsilateral system governs emotional responses in the olfactory system, challenging contralateral theories.