Evolutionary trends in directional hearing

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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.

LanguageEnglish
JournalCurrent Opinion in Neurobiology
Volume40
Pages (from-to)111-117
ISSN0959-4388
DOIs
StatePublished - 22 Jul 2016