Skip to main content
Log in

Contrôle de l'activité des fibres fusimotrices dynamiques et statiques par la formation réticulée mésencéphalique chez le chat

  • Published:
Experimental Brain Research Aims and scope Submit manuscript

Summary

Effects of repetitive stimulation of the mesencephalic reticular formation (MRF) on the static discharge and dynamic sensitivity of muscle spindle primary endings (soleus muscle) were studied in cats anaesthetized with Halothane (Fluothane). By progressive increasing the depth of anaesthesia three different fusimotor effects could be observed:

  1. 1.

    A static effect; the static discharge of the primary endings was strongly increased; the response to phasic stretch was decreased or remained unaltered.

  2. 2.

    A dynamic effect; the dynamic sensitivity of the primary endings was powerfully increased while the rate of discharge under static conditions was only slightly augmented.

  3. 3.

    A depressant effect; the static discharge and the dynamic sensitivity of primary endings were decreased.

Repeated stimulation elicited successive static and dynamic effects. No specific regions within the MRF could be related to a particular effect.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Bibliographie

  • Appelberg, B.: The effect of electrical stimulation of nucleus ruber on the gamma motor system. Acta physiol. scand. 55, 150–159 (1962).

    Google Scholar 

  • —, and I.Z. Kosary: Excitation of flexor fusimotor neurones by electrical stimulation in red nucleus. Acta physiol. scand. 59, 445–453 (1963a).

    Google Scholar 

  • - - Reciprocal fusimotor influence from the red nucleus. Acta physiol. scand. 59, suppl. 213 (1963b).

  • Bessou, P., F. Emonet-Dénand et Y. Laporte: Mécanismes des décharges des fuseaux neuromusculaires provoquées par les fibres motrices alpha chez le chat. J. Physiol. (Paris) 55, 114–115 (1963a).

    Google Scholar 

  • —, F. Emonet-Dénand et Y. Laporte: Occurence of intrafusal muscle fibres innervation by branches of slow alpha motor fibres in the cat. Nature (Lond.) 198, 594–595 (1963b).

    Google Scholar 

  • —, F. Emonet-Dénand et Y. Laporte: Action des fibres alpha fusimotrices sur les réponses statiques et dynamiques des terminaisons primaires des fuseaux neuromusculaires chez le chat. J. Physiol. (Paris) 56, 293 (1965).

    Google Scholar 

  • —, Y. Laporte et B. Pagès: Similitude des effets (statiques ou dynamiques) exercés par des fibres fusimotrices uniques sur les terminaisons primaires de plusieurs fuseaux chez le chat. J. Physiol. (Paris) 58, 31–40 (1966).

    Google Scholar 

  • —, Y. Laporte et B. Pagès: Frequencygrams of spindle primary endings elicited by stimulation of static and dynamic fusimotor fibres. J. Physiol. (Lond.) 196, 47–64 (1968).

    Google Scholar 

  • Bonvallet. M.: Système nerveux et vigilance. ≪La science vivante ≫, Vendôme, P.U.F., 131 p. (1966).

  • Brown, M.C., A. Crowe and P.B.C. Matthews: Observations on the fusimotor fibres of the tibialis posterior muscle of the cat. J. Physiol. (Lond.) 177, 140–159 (1965).

    Google Scholar 

  • Buchwald, J.S., and E. Eldred: Relations between gamma efferent discharge and cortical activity. Electroenceph. clin. Neurophysiol. 13, 243–247 (1961).

    Google Scholar 

  • Crowe, A., and P. B. C. Matthews: The effects of stimulation of static and dynamic fusimotor fibres on the response to stretching of the primary endings of muscle spindles. J. Physiol. (Lond.) 174, 109–131 (1964a).

    Google Scholar 

  • —, and P. B. C. Matthews: Further studies of static and dynamic fusimotor fibres. J. Physiol. (Lond.) 174, 132–151 (1964b).

    Google Scholar 

  • Eldred, E., and B. Fujimori: Relations of the reticular formation to muscle spindle activation. In: Reticular Formation of the Brain, pp. 275–283. Ed. by H.H. Jasper. Little, Brown and Co. 1958.

  • —, R. Granit and P.A. Merton: Supraspinal control of the muscle spindles and its significance. J. Physiol. (Lond.) 122 498–523 (1953).

    Google Scholar 

  • Euler, C. von, and U. Soderberg: The relation between gamma motor activity and the electroencephalogram. Experientia (Basel) 12, 278–279 (1956).

    Google Scholar 

  • Granit, R., and B. Holmgren: Two pathways from brain stem to gamma ventral horn cells. Acta physiol. scand. 35, 93–107 (1955).

    Google Scholar 

  • —, and B.R. Kaada: Influence of stimulation of central nervous structures on muscle spindles in cat. Acta physiol. scand. 27, 130–160 (1952).

    Google Scholar 

  • Hongo, T., K. Kubota and H. Shimazu: E.E.G. spindle and depression of gamma motor activity. J. Neurophysiol. 26, 568–580 (1963).

    Google Scholar 

  • —, H. Shimazu and K. Kubota: A supraspinal inhibitory action on the gamma motor system. In: Symposium on Muscle Receptors, pp. 59–65. Ed. by D. barker. Hong-Kong: Hong-Kong University Press 1962.

    Google Scholar 

  • Laporte, Y.: Un fréquencemètre instantané simplifié. J. Physiol. (Paris) 56, 592 (1964).

    Google Scholar 

  • Matthews, P.B.C.: The differenciation of two types of fusimotor fibre by their effects on the dynamic response of muscle spindle primary endings. Quart. J. exp. Physiol. 47, 324–333 (1962).

    Google Scholar 

  • -Apparatus for studying the response of muscle spindles to stretching. J. Physiol. (Lond.) 169, 58 P (1963).

  • Nyberg-Hansen, R.: Sites and mode of termination of reticulospinal fibers in the cat. An experimental study with silver impregnation methods. J. comp. Neurol. 124, 71–100 (1965).

    Google Scholar 

  • Renn, C.: Etude neurophysiologique du 2 bromo-2 chloro-1-1-1, trifluoréthane (fluothane); nouvelles données expérimentales. Thèse Médecine, Marseille 1965.

  • Shimazu, H., T. Hongo and K. Kubota: Two types of central influences on gamma motor system. J. Neurophysiol. 25, 309–323 (1962a).

    Google Scholar 

  • —: Nature of central regulation of muscle spindle activity. In: Symposium on Muscle Receptors, pp. 49–57. Ed. by D. Barker. Hong-Kong: Hong-Kong University Press 1962.

    Google Scholar 

  • Snider, R.S., and W.T. Niemer: A stereotaxic atlas of the cat brain. Chícago: The University of Chicago Press 1961.

    Google Scholar 

  • Torvik, A., and A. Brodal: The origin of reticulospinal fibers in the cat. Anat. Rec. 128, 113–135 (1957).

    Google Scholar 

  • Vedel, J. P.: Etude du contrôle nerveux central des modalités statique et dynamique de la réponse des récepteurs primaires du fuseau neuromusculaire chez le Chat. Effets d'une stimulation du noyau caudé et de la capsule interne. C.R. Soc. Biol. (Paris) 159, 441 (1965).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Vedel, J.P., Mouillac-Baudevin, J. Contrôle de l'activité des fibres fusimotrices dynamiques et statiques par la formation réticulée mésencéphalique chez le chat. Exp Brain Res 9, 307–324 (1969). https://doi.org/10.1007/BF00235241

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00235241

Key Words

Navigation