Yawning?

@article{Schiller2002Yawning,
  title={Yawning?},
  author={Francis Schiller},
  journal={Journal of the history of the neurosciences},
  year={2002},
  volume={11 4},
  pages={392-401}
}
Since antiquity yawning has attracted a moderate interest among philosophers, psychologists, physiologists, as well as educators, moralists and physicians. Organisms from birds to men and from the womb to the deathbed were found to be displaying it. While sometimes satisfying to the producer, its display is offensive to the lay observer. Hippocrates had it on his lists of useful 'natures.' Aristotle dropped a few words on the matter. Boerhaave elevated its function to the intellect of animals… CONTINUE READING