Classification of unit types in the anteroventral cochlear nucleus: PST histograms and regularity analysis

C. C. Blackburn, M. B. Sachs

Research output: Contribution to journalArticle

Abstract

The responses of neurons in the anteroventral cochlear nucleus (AVCN) of barbiturate-anesthetized cats are characterized with regard to features of their responses to short tone bursts (STBs; 25 ms). A 'decision tree' is presented to partition AVCN units on the basis of post-stimulus time histogram (PSTH) shape, first spike latency, and discharge rate and regularity calculated as functions of time during responses to STBs. The major classes of AVCN units (primary-like, primary-like-with-notch, chopper and onset) have been described previously; in this paper, special attention is given to clarifying and systematizing boundaries between classes. Certain types of 'unusual' units that may be confused with units in one of the major classes are also examined. When STBs are presented synchronously (constant phase at onset), PSTHs of responses to very-low-frequency (20 ms). Choppers that exhibit this third rate adaptation pattern may have discharge regularities spanning the combined range of the other two patterns; the chopper population as a whole thus exists as a continuum with respect to discharge regularity. The chopper population appears to be homogeneous with respect to first spike latency and synchronization to tones; there are, however, a number of response features that change systematically with discharge regularity. A hypothesis concerning the source of the systematic variation of these response properties within the chopper population is presented.

Original languageEnglish (US)
Pages (from-to)1303-1329
Number of pages27
JournalJournal of Neurophysiology
Volume62
Issue number6
StatePublished - 1989

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Cochlear Nucleus
Population
Decision Trees
Cats
Neurons

ASJC Scopus subject areas

  • Physiology
  • Neuroscience(all)

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Classification of unit types in the anteroventral cochlear nucleus : PST histograms and regularity analysis. / Blackburn, C. C.; Sachs, M. B.

In: Journal of Neurophysiology, Vol. 62, No. 6, 1989, p. 1303-1329.

Research output: Contribution to journalArticle

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