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Bodily markers of basic emotions: a thermographic study.

Danila Shelepenkov1, Alfred Essel1, Vladimir Kosonogov2

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American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
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Skin temperature changes can indicate emotions. Chest temperature increased most significantly across various emotions like fear and happiness, correlating with heart rate, suggesting specific thermal reactions in different body regions.

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Area of Science:

  • Psychophysiology
  • Affective neuroscience
  • Human thermoregulation

Background:

  • Skin temperature is a recognized marker of emotional arousal.
  • Previous research has not sufficiently explored temperature variations across different body parts and basic emotions.

Purpose of the Study:

  • To investigate if basic emotions are reflected in temperature changes at specific body surfaces.
  • To explore the relationship between emotional stimuli and localized skin temperature variations.

Main Methods:

  • Forty healthy subjects were exposed to images inducing six basic emotions and neutral stimuli.
  • Skin temperature was recorded at the shoulder, throat, chest, and temple.
  • Electrodermal activity and electrocardiograms were captured as control variables.

Main Results:

  • Chest temperature showed the greatest average increase compared to other regions.
  • Chest temperature increased across multiple emotions, including fear, surprise, and happiness.
  • Chest temperature changes correlated with heart rate, suggesting a link to cardiac activity.
  • Temperature variations across different body regions were not correlated, indicating localized thermal responses.

Conclusions:

  • Specific emotions are associated with distinct temperature changes at different body surfaces.
  • Chest temperature may serve as a sensitive indicator for certain emotional states and physiological arousal.
  • Further research with refined methodologies and additional physiological measures is warranted to fully elucidate emotion-specific thermoregulation.