Yawning. A homeostatic reflex and its psychological significance.

@article{Lehmann1979YawningAH,
  title={Yawning. A homeostatic reflex and its psychological significance.},
  author={Heinz E. Lehmann},
  journal={Bulletin of the Menninger Clinic},
  year={1979},
  volume={43 2},
  pages={123-6}
}
Yawning is a common phenomenon that is an expression of certain physiological and psychological states, yet it bas received remarkably little attention in the medical literature. Dumpert (1921), Hauptmann (1920), and Lewy (1921) reached some conclusions regarding the nature of yawning in connection with observations of patients with encephalitis lethargica; however, after the 1920s the subject was again disregarded. On the basis of certain clinical and experimental observations which may have… CONTINUE READING