Neuronal plasticity and regeneration in the olfactory system of mammals: morphological and functional recovery following olfactory bulb deafferentation |
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Authors: | L Astic D Saucier |
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Institution: | (1) Laboratoire de Neurosciences et Systèmes sensoriels, 43 Bd du 11 Novembre 1918, Université Claude Bernard/Lyon 1, 69622 Villeurbanne Cedex (France), Fax +33 4 78 94 95 85, e-mail: astic@olfac.univ-lyon1.fr, FR;(2) Université de Moncton, Campus de Shippagan, Shippagan (N.B., Canada), CA |
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Abstract: | The mammalian olfactory system has the unique property in the permanent turnover of the olfactory sensory neurons under normal
conditions and following injury. This implies that the topographical map of the epithelium-to-bulb connections generated during
ontogenesis has to be maintained despite neuron renewal in order to insure olfactory information processing. One way to investigate
this issue has been to disrupt the peripheral connections and analyze how neural connections may be reestablished as well
as how animals may perform in olfactory-mediated tasks. This review surveys the main data pertaining to both morphological
and functional recoveries taking place in the peripheral olfactory system following olfactory bulb deafferentation. Conclusions
from these studies are enlightened by recent data from molecular biology. |
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Keywords: | , Olfaction, nerve transection, bulbectomy, regeneration, behavioral recovery, topographical map, odor coding, |
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