Experimental Brain Research

, Volume 48, Issue 2, pp 309–313 | Cite as

Non-cerebellar visual afferents to the vestibular nuclei involving the prepositus hypoglossal complex: An autoradiographic study in the rat

  • L. Cazin
  • M. Magnin
  • J. Lannou
Research Note


Radioactive amino-acids were injected into the nucleus reticularis tegmenti pontis (NRTP) and the pretectum (PT) in the rat. Beside the labeling of the several nuclei which are known to receive afferents of either the NRTP and/or the PT, monosynaptic projections from these two structures to the prepositus hypoglossal complex (PHN) were demonstrated. Pretectal visual inputs to the vestibular nuclei (VN) may thus be conveyed not only by the classical PT-inferior olive-cerebellar route, but also by two other non-cerebellar ones involving the strong efferent projections of the PHN onto the VN. These last two pathways are strong candidates to account for the residual visual sensitivity of VN neurons after cerebellectomy or inferior olive lesions.

Key words

Vestibular nuclei Visual afferents 


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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • L. Cazin
    • 1
  • M. Magnin
    • 2
  • J. Lannou
    • 1
  1. 1.Laboratoire de Neurophysiologie SensorielleFaculté des Sciences et des Techniques de RouenMont-Saint-AignanFrance
  2. 2.Laboratoire de Neuropsychologie ExpérimentaleINSERM U.94BronFrance

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