Specificity of VIIIth nerve regeneration in lower vertebrates

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From the initial studies of Sperry (Am. J. Physiol, 144:735–741, 1945) to more recent investigations, the regenerative capacity of the VIIIth cranial nerve in nonmammalian vertebrates has been noted for its robust and accurate recovery of functional connections after transection. The VIIIth cranial nerve contains nerve fibers that link functionally distinct sensory epithelial to various areas within the central nervous system (CNS), yet after transection these multiple components of the nerve navigate back to their original central target areas, without innervating inappropriate nuclei. A number of factors may be required to establish and direct VIIIth nerve regeneration. Cellular interactions appear to be necessary for the initiation of outgrowth and the maintenance of neural connections. The release of chemotropic substances from target cells has been postulated as the most likely mechanism guiding the reinnervation of central targets. Furthermore, the growth characteristics of these neurons in tissue culture, without target cells present, indicates that intrinsically regulated growth features may also contribute to the process of VIIIth nerve regeneration.

Original languageEnglish (US)
Pages (from-to)254-260
Number of pages7
JournalJournal of Experimental Zoology
Issue number3
StatePublished - Mar 1 1992

All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology

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