Autonomic nervous system activity distinguishes among emotions.

@article{Ekman1983AutonomicNS,
  title={Autonomic nervous system activity distinguishes among emotions.},
  author={Paul Ekman and Robert W Levenson and W V Friesen},
  journal={Science},
  year={1983},
  volume={221 4616},
  pages={
          1208-10
        }
}
Emotion-specific activity in the autonomic nervous system was generated by constructing facial prototypes of emotion muscle by muscle and by reliving past emotional experiences. The autonomic activity produced distinguished not only between positive and negative emotions, but also among negative emotions. This finding challenges emotion theories that have proposed autonomic activity to be undifferentiated or that have failed to address the implications of autonomic differentiation in emotion. 
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Tomkins for their comments on this report; the John D. and Catherine T. Mac- Arthur Foundation for research funding; and L. Tcmoshok, J. Kamiya, and L. Zegans for the use of equipment
  • Tomkins for their comments on this report; the John D. and Catherine T. Mac- Arthur Foundation for research funding; and L. Tcmoshok, J. Kamiya, and L. Zegans for the use of equipment
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