Classification of subpopulations of neurons in the cochlear nuclei of the kangaroo rat.

Abstract This study was undertaken in order to assess the functional significance of the different cell types and different cytoarchitectural fields of the cochlear nuclei. The cochlear nuclei of the kangaroo rat can be delineated into six regions on the basis of relative densities and organization of the different soma types contained within it. Evidence is presented which indicates that the responses of neurons to tonal stimulation may be categorized on the basis of their impulse discharge patterns. The relationship between cytoarchitectural fields and discharge patterns suggests that the six areas show considerable variation in their response characteristics. In addition, neurons injected with Procion yellow could be directly correlated with their individual spike discharge patterns.

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