Evolutionary trends in directional hearing

Curr Opin Neurobiol. 2016 Oct;40:111-117. doi: 10.1016/j.conb.2016.07.001. Epub 2016 Jul 22.


Tympanic hearing is a true evolutionary novelty that arose in parallel within early tetrapods. We propose that in these tetrapods, selection for sound localization in air acted upon pre-existing directionally sensitive brainstem circuits, similar to those in fishes. Auditory circuits in birds and lizards resemble this ancestral, directionally sensitive framework. Despite this anatomically similarity, coding of sound source location differs between birds and lizards, although all show mechanisms for enhancing sound source directionality. Comparisons with mammals reveal similarly complex interactions between coding strategies and evolutionary history.

Publication types

  • Review

MeSH terms

  • Animals
  • Biological Evolution*
  • Hearing / physiology*
  • Sound
  • Sound Localization / physiology*
  • Tympanic Membrane / physiology