Cerebellar afferents in teleost catfish (lctaluridae)


  • Thomas E. Finger

    1. Department of Anatomy and Neurobiology, Washington University Medical School, 660 South Euclid Avenue, St. Louis, Missouri 63110
    Current affiliation:
    1. Department of Anatomy, University of Colorado Medical Centre, 4200 E. 9th Avenue, Denver, Colorado 80262
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The cerebellar afferents in the bullhead catfish (Teleostei) were labeled by relying on the retrograde transport of horseradish peroxidase (HRP). Retrogradely labeled neurons were seen in: spinal cord, lateral cuneate nucleus, inferior olive, reticular nuclei, vestibular nuclei, nucleus subeminentialis, n. lateralis valvulae, locus coeruleus, n. mesencephalicus dorsalis, the basal optic nuclei, and a nucleus at the isthmic level which may be equivalent to the pontine nuclei of birds and mammals. Inputs to the molecular layer arise from the inferior olive, locus coeruleus and n. lateralis valvulae in addition to subjacent granule cells.

No projections to cerebellum were seen to arise from either the optic tectum or from the inferior lobe. The so-called “lobo-cerebellar” tract in teleosts was reported by Goldstein, amongst many others, who mistook the superior secondary nucleus for a deep cerebellar nucleus.