Postnatal Developement of the Cochlea in Horseshoe Bats

  • M. Vater
  • R. Rübsamen
Part of the NATO ASI Series book series (NSSA)


The mammalian cochlea exhibits immature features in early postnatal development. Physiological responses are restricted to the low frequency range, and structural maturation is proceeding from basal cochlear locations towards the apex (review: Romand, 1983). The development of the cochlear frequency representation is an intriguing problem, however there are few frequency mapping studies in mammals. Cochlear microphonic measurements in gerbils showed that in postnatal development a shift in frequency place map takes place for basal regions of the cochlea (Arjmand et al., 1988) which are tuned to frequencies about 1.5 octaves lower than in the adult. The hypothesis that a reorganization of the cochlear frequency mapping pattern occurs during development (Lippe and Rubel, 1983) is thus supported for locations responsive to high frequencies in adult mammals, although it does not apply for apical cochlear regions (Arjmand et al., 1988) and has been generelly questioned by a developmental study in birds (Manley et al., 1987).


Outer Hair Cell Cochlear Nucleus Postnatal Development Early Postnatal Development Tuning Characteristic 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Arjmand, E., Harris, D. and Dallos, P. (1988) Developmental changes in frequency mapping of the gerbil cochlea: Comparison of two cochlear locations. Hearing Res. 32, 93–96.CrossRefGoogle Scholar
  2. Bruns, V. and Schmieszek, E. (1980) Cochlear innervation in the Greater horseshoe bat: demonstration of an acoustic fovea. Hearing Res. 3:27–43.CrossRefGoogle Scholar
  3. Feng, A.S. and Vater, M. (1985) Functional organization of the cochlear nucleus of rufous horseshoe bats (Rhinolophus rouxi): Frequencies and internal connections are arranged in slabs. J. comp. Neurol. 235, 529–555.PubMedCrossRefGoogle Scholar
  4. Harris, D.M. and Dallos, P. (1984) Ontogenetic changes in frequency mapping of a mammalian ear. Science 225, 741–743.PubMedCrossRefGoogle Scholar
  5. Lippe, W. and Rubel, E.W. (1983) Development of the place principle. Science 219, 514–516.PubMedCrossRefGoogle Scholar
  6. Manley, G.A., Brix, J. and Kaiser, A. (1987) Developmental stability of the tonotopic organization of the chick’s basilar papilla. Science 237, 655–656.PubMedCrossRefGoogle Scholar
  7. Romand, R. (1983) Development of the cochlea. In: Development of auditory and vestibular systems (Ed. Romand, R.) Academic Press, New York, pp. 47–88.Google Scholar
  8. Rübsamen, R. (1987) Ontogenesis of the echolocation system in the rufous horseshoe bat, Rhinolophus rouxi (Audition and vocalization in early postnatal development). J. comp. Physiol. 161, 899–913.CrossRefGoogle Scholar
  9. Vater, M. (1987) Narrow-band frequency analysis in bats. In: Recent advances in the study of bats (Eds. Fenton, M.B., Racey, P., and Rayner, J.M.V.) Cambridge University Press, Cambridge, pp.200–226.Google Scholar
  10. Vater, M. (1988) Lightmicroscopic observations on cochlear development in horseshoe bats. In: Animal sonar systems (Ed. Nachtigall, P.) Plenum Press, New York, London (in press).Google Scholar
  11. Vater, M., Feng, A.S., and Betz, M. (1985) An HRP-study of the frequency place map of the horseshoe bat cochlea: Morphological correlates of the sharp tuning to a narrow frequency band. J. comp. Physiol. 157, 671–686.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • M. Vater
    • 1
    • 2
  • R. Rübsamen
    • 1
    • 2
  1. 1.Zoologisches Institut8 MünchenGermany
  2. 2.Lehrstuhl für ZoologieRuhruniversität BochumBochumGermany

Personalised recommendations