Postnatal development of central auditory frequency maps |
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Authors: | Rudolf Rübsamen |
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Institution: | (1) Lehrstuhl für Allgemeine Zoologie und Neurobiologie, Ruhr-Universität Bochum, W-4630 Bochum, Germany;(2) Present address: Hearing Development Laboratories, Department of Otolaryngology, RL-30 University of Washington, 98195 Seattle, Washington, USA |
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Abstract: | Summary In the early postnatal period of many mammals and in the perihatching period of chicks the auditory ranges are restricted to the species-specific low- and mid-frequency ranges. During subsequent development, the high frequency hearing expands (depending on the species) by 1–4 octaves. Adult-like audition is established between the 4th and the 7th week. It is still discussed controversially, how the extension of the auditory ranges relates to the maturation of orderly frequency representation in the cochleae of the respective species. The present review summarizes investigations of the development of tonotopy in nuclei of the central auditory system, and discusses how the centrally acquired data might contribute to the understanding of the maturation of cochlear stimulus transduction and to the development of frequency maps.Abbreviations
ANF
auditory nerve fibers
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BF
best frequency
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CN
cochlear nucleus
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DAB
days after birth
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DCN
dorsal cochlear nucleus
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IC
inferior colliculus
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IHC
inner hair cells
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HS
Hipposideros speoris
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LSO
lateral superior olive
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MGB
medial geniculate body (auditory thalamus)
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NL
Nucleus laminaris
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NM
Nucleus magnocellularis
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OHC
outer hair cells
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RR
Rhinolophus rouxi
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SOC
superior olivary complex
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2-DG
2-deoxyglucose |
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Keywords: | Ontogeny Auditory system Tonotopy Chicken Rodent Cat Bat |
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