The Anatomy of the Developing Ear

  • Goran Bredberg
Part of the Advances in the Study of Communication and Affect book series (ASCA, volume 10)

Abstract

The gross anatomy of the ear is shown in Figure 1. The ear is essentially a mechanical transducer of sound. Sound entering the external auditory canal vibrates the tympanic membrane or eardrum. The ossicles of the middle ear translate this vibratory motion of the eardrum into a pistonlike movement of the stapes at the oval window of the cochlea. The motion of the footplate of the stapes initiates a traveling wave along the basilar membrane of the cochlea. Distortion of the basilar membrane, in turn, exerts a shearing force on the hair cells, eventually leading to impulses along the eighth auditory nerve. Clearly then, auditory information processing will depend on, or at least be limited by, the mechanics of this system both at a gross-anatomical level (the resonance characteristics of the external auditory canal, the acoustic impedances of the various mechanical systems, etc.) and microanatomical level (the electrical and mechanical characteristics of the hair cells and supporting structures). Consequently, we might expect anatomical development to influence or limit how infants respond to sounds.

Keywords

Hair Cell Outer Hair Cell External Auditory Canal Fluid Space Tectorial Membrane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1985

Authors and Affiliations

  • Goran Bredberg
    • 1
  1. 1.Department of AudiologySödersjukhusetStockholmSweden

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