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Neuronal organizations of descending pathways for controlling neck movements. Shigeto SASAKI 1 1Department of Physiology, Institute of Brain Research, Faculty of Medicine, University of Tokyo pp.926-935
Published Date 1987/12/10
DOI https://doi.org/10.11477/mf.1431905942
  • Abstract
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Dorsal neck motoneurones innervating splenius (SPL) and biventer cervicis and complexus (BCC) muscles received disynaptic excitatory effects after stimulation of the tectum and the pyramid in cats. These effects were mediated by reticulospinal neurones (RSNs) in the nucleus reticularis pontis caudalis (NRPC) and the nucleus reticularis gigantocellularis (NRG). While a majority of RSNs received monosynaptic excitatory inputs from the tectal and pyramidal volleys, RSNs in the NRPC and those in NRG differed in the following points. The majority of RSNs in the NRPC received a larger input from the tectum than from the pyramid, and descended in the ipsilateral ventral funiculus in the C3 segment. RSNs in the NRG, in contrast, had a stronger input in general from the pyramid than from the tectum and descended in the ventrolateral or lateral funiculus of the ipsilateral side, or contralateral funiculi in the C3 segment.


Copyright © 1987, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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