Central trajectories of type II spiral ganglion neurons

M. C. Brown, A. M. Berglund, N. Y.S. Kiang, D. K. Ryugo

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Previous attempts to trace the central pathways of the thin axons from type II spiral ganglion neurons have been hampered by technical difficulties such as fading of the reaction product as distance increases from the injection site (Ryugo et al.: Soc. Neurosci. Abstr. 12:779, '86; Brown: J. Comp. Neurol. 260:591–604, '87). By using small rodents (gerbils and mice), which have short auditory nerves, we have succeeded in filling the entire central axon and terminals of type II neurons after peripheral injections of horseradish peroxidase. The general course of the type II fibers within the auditory nerve and cochlear nucleus is similar to that of type I fibers except that terminals from type II neurons are often found in regions of the cochlear nucleus that have high densities of granule cells.

Original languageEnglish (US)
Pages (from-to)581-590
Number of pages10
JournalJournal of Comparative Neurology
Issue number4
StatePublished - Dec 22 1988


  • auditory nerve
  • cochlear nucleus granule cell
  • outer hair cell
  • unmyelinated afferent

ASJC Scopus subject areas

  • General Neuroscience


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