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. 1977 Jun;268(2):493–510. doi: 10.1113/jphysiol.1977.sp011868

Properties of vestibular neurones projecting to neck segments of the cat spinal cord*

S Rapoport 1, A Susswein 1,†, Y Uchino 1, V J Wilson 1
PMCID: PMC1283675  PMID: 874918

Abstract

1. Vestibular neurones projecting to the upper cervical grey matter (vestibulocollic neurones) were identified by localized microstimulation in the C3 segment of the cat spinal cord.

2. The neurones were found in the lateral (Deiters'), medial and descending nuclei bilaterally and projected to the spinal cord in the lateral and medial vestibulospinal tracts (LVST and MVST). Ipsilateral axons of Deiters' neurones were mostly in the LVST, axons of medial and descending neurones in the MVST; a few Deiters' neurones had axons in the MVST; some descending neurones had axons in the LVST. Most axons of contralateral neurones were in the MVST.

3. The axons of 62% of ipsilateral vestibulocollic Deiters' neurones not only gave off a collateral to C3, but also extended as far as the cervical enlargement (`branching'); some of these neurones projected as far as the upper thoracic cord, almost none to the lumbar cord. Ipsilateral descending nucleus neurones branch in the same fashion, but there is no branching in the relatively small medial nucleus population.

4. A large majority of vestibulocollic neurones receive monosynaptic excitation from the ipsilateral labyrinth and a number are inhibited by stimulation of the contralateral labyrinth (commissural inhibition). It is possible that commissural inhibition acts on a broad population of vestibular neurones involved in the control of eye, head and trunk movement.

5. Vestibulocollic neurones do not make up a homogeneous population acting only on the neck. Instead it is likely that subpopulations, for example branching and non-branching neurones, have different functions.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Abzug C., Maeda M., Peterson B. W., Wilson V. J. Branching of individual lateral vestibulospinal axons at different spinal cord levels. Brain Res. 1973 Jun 29;56:327–330. doi: 10.1016/0006-8993(73)90346-6. [DOI] [PubMed] [Google Scholar]
  2. Abzug C., Maeda M., Peterson B. W., Wilson V. J. Cervical branching of lumbar vestibulospinal axons. J Physiol. 1974 Dec;243(2):499–522. doi: 10.1113/jphysiol.1974.sp010764. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Akaike T. Comparison of neuronal composition of the vestibulospinal system between cat and rabbit. Exp Brain Res. 1973 Nov 29;18(4):429–432. doi: 10.1007/BF00239110. [DOI] [PubMed] [Google Scholar]
  4. Akaike T., Fanardjian V. V., Ito M., Kumada M., Nakajima H. Electrophysiological analysis of the vestibulospinal reflex pathway of rabbit. I. Classification of tract cells. Exp Brain Res. 1973 Jul 30;17(5):477–496. doi: 10.1007/BF00234863. [DOI] [PubMed] [Google Scholar]
  5. Akaike T., Fanardjian V. V., Ito M., Ono T. Electrophysiological analysis of the vestibulospinal reflex pathway of rabbit. II. Synaptic actions upon spinal neurones. Exp Brain Res. 1973 Jul 30;17(5):497–515. doi: 10.1007/BF00234864. [DOI] [PubMed] [Google Scholar]
  6. Baker R., Precht W., Llinás R. Cerebellar modulatory action on the vestibulo-trochlear pathway in the cat. Exp Brain Res. 1972;15(4):364–385. doi: 10.1007/BF00234124. [DOI] [PubMed] [Google Scholar]
  7. DARIAN-SMITH I., PHILLIPS G., RYAN R. D. FUNCTIONAL ORGANIZATION IN THE TRIGEMINAL MAIN SENSORY AND ROSTRAL SPINAL NUCLEI OF THE CAT. J Physiol. 1963 Aug;168:129–146. doi: 10.1113/jphysiol.1963.sp007182. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Gustafsson B., Jankowska E. Direct and indirect activation of nerve cells by electrical pulses applied extracellularly. J Physiol. 1976 Jun;258(1):33–61. doi: 10.1113/jphysiol.1976.sp011405. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Jankowska E., Roberts W. J. An electrophysiological demonstration of the axonal projections of single spinal interneurones in the cat. J Physiol. 1972 May;222(3):597–622. doi: 10.1113/jphysiol.1972.sp009817. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Maeda M., Shimazu H., Shinoda Y. Nature of synaptic events in cat abducens motoneurons at slow and quick phase of vestibular nystagmus. J Neurophysiol. 1972 May;35(3):279–296. doi: 10.1152/jn.1972.35.3.279. [DOI] [PubMed] [Google Scholar]
  11. Maeda M., Shimazu H., Shinoda Y. Rhythmic activities of secondary vestibular efferent fibers recorded within the abducens nucleus during vestibular nystagmus. Brain Res. 1971 Nov;34(2):361–365. doi: 10.1016/0006-8993(71)90287-3. [DOI] [PubMed] [Google Scholar]
  12. NYBERG-HANSEN R., MASCITTI T. A. SITES AND MODE OF TERMINATION OF FIBERS OF THE VESTIBULOSPINAL TRACT IN THE CAT. AN EXPERIMENTAL STUDY WITH SILVER IMPREGNATION METHODS. J Comp Neurol. 1964 Jun;122:369–383. doi: 10.1002/cne.901220307. [DOI] [PubMed] [Google Scholar]
  13. NYBERG-HANSEN R. ORIGIN AND TERMINATION OF FIBERS FROM THE VESTIBULAR NUCLEI DESCENDING IN THE MEDIAL LONGITUDINAL FASCICULUS. AN EXPERIMENTAL STUDY WITH SILVER IMPREGNATION METHODS IN THE CAT. J Comp Neurol. 1964 Jun;122:355–367. doi: 10.1002/cne.901220306. [DOI] [PubMed] [Google Scholar]
  14. Peterson B. W., Maunz R. A., Pitts N. G., Mackel R. G. Patterns of projection and braching of reticulospinal neurons. Exp Brain Res. 1975 Oct 24;23(4):333–351. doi: 10.1007/BF00238019. [DOI] [PubMed] [Google Scholar]
  15. Petras J. M. Cortical, tectal and tegmental fiber connections in the spinal cord of the cat. Brain Res. 1967 Oct;6(2):275–324. doi: 10.1016/0006-8993(67)90196-5. [DOI] [PubMed] [Google Scholar]
  16. SUZUKI J. I., COHEN B. HEAD, EYE, BODY AND LIMB MOVEMENTS FROM SEMICIRCULAR CANAL NERVES. Exp Neurol. 1964 Nov;10:393–405. doi: 10.1016/0014-4886(64)90031-7. [DOI] [PubMed] [Google Scholar]
  17. Shimazu H., Precht W. Inhibition of central vestibular neurons from the contralateral labyrinth and its mediating pathway. J Neurophysiol. 1966 May;29(3):467–492. doi: 10.1152/jn.1966.29.3.467. [DOI] [PubMed] [Google Scholar]
  18. Shinoda Y., Arnold A. P., Asanuma H. Spinal branching of corticospinal axons in the cat. Exp Brain Res. 1976 Oct 28;26(3):215–234. doi: 10.1007/BF00234928. [DOI] [PubMed] [Google Scholar]
  19. Shinoda Y., Yoshida K. Dynamic characteristics of responses to horizontal head angular acceleration in vestibuloocular pathway in the cat. J Neurophysiol. 1974 Jul;37(4):653–673. doi: 10.1152/jn.1974.37.4.653. [DOI] [PubMed] [Google Scholar]
  20. WILSON V. J., KATO M., THOMAS R. C. EXCITATION OF LATERAL VESTIBULAR NEURONES. Nature. 1965 Apr 3;206:96–97. doi: 10.1038/206096a0. [DOI] [PubMed] [Google Scholar]
  21. Wilson V. J., Kato M., Peterson B. W., Wylie R. M. A single-unit analysis of the organization of Deiters' nucleus. J Neurophysiol. 1967 May;30(3):603–619. doi: 10.1152/jn.1967.30.3.603. [DOI] [PubMed] [Google Scholar]
  22. Wilson V. J., Maeda M. Connections between semicircular canals and neck motorneurons in the cat. J Neurophysiol. 1974 Mar;37(2):346–357. doi: 10.1152/jn.1974.37.2.346. [DOI] [PubMed] [Google Scholar]
  23. Wilson V. J., Maeda M., Franck J. I., Shimazu H. Mossy fiber neck and second-order labyrinthine projections to cat flocculus. J Neurophysiol. 1976 Mar;39(2):301–310. doi: 10.1152/jn.1976.39.2.301. [DOI] [PubMed] [Google Scholar]
  24. Wilson V. J. Physiological pathways through the vestibular nuclei. Int Rev Neurobiol. 1972;15:27–81. doi: 10.1016/s0074-7742(08)60328-1. [DOI] [PubMed] [Google Scholar]
  25. Wilson V. J., Wylie R. M., Marco L. A. Projection to the spinal cord from the medial and descending vestibular nuclei of the cat. Nature. 1967 Jul 22;215(5099):429–430. doi: 10.1038/215429a0. [DOI] [PubMed] [Google Scholar]
  26. Wilson V. J., Wylie R. M., Marco L. A. Synaptic inputs to cells in the medial vestibular nucleus. J Neurophysiol. 1968 Mar;31(2):176–185. doi: 10.1152/jn.1968.31.2.176. [DOI] [PubMed] [Google Scholar]
  27. Wilson V. J., Yoshida M. Comparison of effects of stimulation of Deiters' nucleus and medial longitudinal fasciculus on neck, forelimb, and hindlimb motoneurons. J Neurophysiol. 1969 Sep;32(5):743–758. doi: 10.1152/jn.1969.32.5.743. [DOI] [PubMed] [Google Scholar]
  28. Wilson V. J., Yoshida M. Monosynaptic inhibition of neck motoneurons by the medial vestibular nucleus. Exp Brain Res. 1969;9(4):365–380. doi: 10.1007/BF00235245. [DOI] [PubMed] [Google Scholar]

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