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Neural activity states in different forms of physiological tremor. Facts and hypotheses

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Abstract

This paper attempts to combine (and thereby briefly review) various sets of physiological data in order to outline a qualitative model of the different states of stochastic neural activity underlying different forms of physiological tremor. Particular emphasis in put on spatial distributions of the properties of neural elements and their interconnexions, and on discharge characteristics of motor units and muscle spindle afferents including so-called “early discharges” and nonlinearities. It is argued that the wide variety of internal anatomical and functional structures of skeletal muscles and of their reflex organization must be considered when dealing with stability problems. Computer simulations of stochastic population models of the involved neuromuscular elements are advocated as means to investigate the relative importance of the many factors possibly contributing to stabilizing or de-stabilizing neuromuscular systems.

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References

  • Adam, D., Windhorst, U., Inbar, G.F.: The effects of recurrent inhibition on the cross-correlated firing patterns of motoneurones (and their relation to signal transmission in the spinal cord-muscle channel). Biol. Cybern. 29, 229–235 (1978)

    Google Scholar 

  • Andreassen, S., Rosenfalck, A.: Regulation of the firing pattern of single motor units. J. Neurol. Neurosurg. Psychiat. 43, 897–906 (1980)

    Google Scholar 

  • Appenteng, K., O'Donovan, M.J., Somjen, G., Stephens, J.A., Taylor, A.: The projection of jaw elevator muscle spindle afferents to fifth nerve motoneurones in the cat. J. Physiol. (Lond.) 279, 409–423 (1978)

    Google Scholar 

  • Bilotto, G., Schor, R.H., Uchino, Y., Wilson, V.J.: Localization of proprioceptive reflexes in the splenius muscle of the cat. Brain Res. 238, 217–221 (1982)

    Google Scholar 

  • Binder, M.D., Kroin, J.S., Moore, G.P., Stauffer, E.K., Stuart, D.G.: Correlation analysis of muscle spindle responses to single motor unit contractions. J. Physiol. 257, 325–336 (1976)

    Google Scholar 

  • Binder, M.D., Kroin, J.S., Moore, G.P., Stuart, D.G.: The response of Golgi tendon organs to single motor unit contractions. J. Physiol. (Lond.) 271, 337–349 (1977)

    Google Scholar 

  • Binder, M.D., Stuart, D.G.: Responses of Ia and spindle group II afferents to single motor-units contractions. J. Physiol. 43, 621–629 (1980a)

    Google Scholar 

  • Binder, M.D., Stuart, D.G.: Motor unit-muscle receptor interactions: design features of the neuromuscular control system. In: Desmedt, J.E. (ed.) Spinal and supraspinal mechanisms of voluntary motor control and locomotion. Progress in clinical neurophysiology, Vol. 8, pp. 72–98. Basel: Karger 1980b

    Google Scholar 

  • Botterman, B.R., Hamm, T.M., Reinking, R.M., Stuart, D.G.: Localization of monosynaptic Ia excitatory post-synaptic potentials in the motor nucleus of the cat biceps femoris muscle. J. Physiol. (Lond.) 338, 355–377 (1983a)

    Google Scholar 

  • Botterman, B.R., Hamm, T.M., Reinking, R.M., Stuart, D.G.: Distribution of monosynaptic Ia excitatory post-synaptic potentials in the motor nucleus of the cat semitendinosus muscle. J. Physiol. (Lond.). 338, 379–393 (1983b)

    Google Scholar 

  • Brink, E.E., Jinnai, K., Wilson, V.J.: Pattern of segmental monosynaptic input to cat dorsal neck motoneurons. J. Neurophysiol. 46, 496–505 (1981)

    Google Scholar 

  • Burke, R.E., Strick, P.L., Kanda, K., Kim, C.C., Walmsley, B.: Anatomy of medial gastrocnemius and soleus motor nuclei in cat spinal cord. J. Neurophysiol. 40, 667–680 (1977)

    Google Scholar 

  • Burke, R.E., Tsairis, P.: Anatomy and innervation ratios in motor units of cat gastrocnemius. J. Physiol. (Lond.) 234, 749–765 (1973)

    Google Scholar 

  • Cameron, W.E., Binder, M.D., Botterman, B.R., Reinking, R.M., Stuart, D.G.: Motor unit — muscle spindle interactions in active muscles of decerebrate cats. Neurosci. Lett. 19, 55–60 (1980)

    Google Scholar 

  • Cameron, W.E., Binder, M.D., Botterman, B.R., Reinking, R.M., Stuart, D.G.: “Sensory partitioning” of cat medial gastrocnemius muscle by its muscle spindle and tendon organs. J. Neurophysiol. 46, 32–47 (1981)

    Google Scholar 

  • Christakos, C.N.: A study of the muscle force waveform using a population stochastic model of skeletal muscle. Biol. Cybern. 44, 91–106 (1982a)

    Google Scholar 

  • Christakos, C.N.: A study of electromyogram using a population stochastic model of skeletal muscle. Biol. Cybern. 45, 5–12 (1982b)

    Google Scholar 

  • Christakos, C.N., Rost, I., Windhorst, U.: Modulation of muscle stretch receptor discharge by motor unit activity in the cat as revealed by spectral analysis. J. Physiol. (Lond.) 341, 17–18P (1983)

    Google Scholar 

  • Christakos, C.N., Rost, I., Windhorst, U.: The use of frequency domain techniques in the study of signal transmission in skeletal muscle. Pflügers Arch. 400, 100–105 (1984)

    Google Scholar 

  • Clamann, H.: Statistical analysis of motor unit firing patterns in a human skeletal muscle. Biophys. J. 9, 1233–1251 (1969)

    Google Scholar 

  • Desmedt, J.E. (ed.): Physiological tremor, pathological tremors and clonus; Progr. clin. Neurophysiol., Vol. 5. Karger, Basel 1978

    Google Scholar 

  • Elble, R.J., Randall, J.E.: Motor-unit activity responsible for 8- to 12-Hz component of human physiological finger tremor. J. Neurophysiol. 39, 370–383 (1976)

    Google Scholar 

  • Ezure, K., Fukushima, K., Schor, R.H., Wilson, V.J.: Compartmentalization of the cervicocollic reflex in cat splenius muscle. Exp. Brain Res. 51, 397–404 (1983)

    Google Scholar 

  • Gottlieb, S., Lippold, O.C.J. The 4–6 Hz tremor during sustained contraction in normal human subjects. J. Physiol. (Lond.) 336, 499–509 (1983)

    Google Scholar 

  • Hagbarth, K.-E., Young R.R.: Participation of the stretch reflex in human physiological tremor. Brain 102, 509–526 (1979)

    Google Scholar 

  • Henneman, E., Mendell, L.M.: Functional organization of motoneuron pool and its inputs. In: Brooks, V.C. (ed.). Handbook of Physiology, Sect. 1: The Nervous System, Vol. II; Motor Control, Part 1, pp. 423–507. Am. Physiol. Soc., Bethesda 1981

  • Hultborn, H., Wigström, H.: Motor response with long latency and maintained duration evoked by activity in Ia afferents. In: Desmedt, J.E. (ed.). Spinal and supraspinal mechanisms of voluntary motor control and locomotion Progr. clin. Neurophysiol., Vol. 8; pp. 99–116. Karger, Basel 1980

    Google Scholar 

  • Inbar, G.F., Ginat, T.: Effects of muscle model parameter dispersion and multi-loop segmental interaction on the neuromuscular system performance. Biol. Cybern. 48, 69–83 (1983)

    Google Scholar 

  • Jami, L., Murthy, K.S.K., Petit, J.: A quantitative study of skeletofusimotor innervation in the cat peroneus tertius muscle. J. Physiol. (Lond.) 325, 125–144 (1982)

    Google Scholar 

  • Jankowska, E., Johannisson, T., Lipski, J.: Common interneurones in reflex pathways from group Ia and Ib afferents of ankle extensors in the cat. J. Physiol. (Lond.) 310, 381–402 (1981)

    Google Scholar 

  • Kirkwood, P.A., Sears, T.A. Excitatory post-synaptic potentials from single muscle spindle afferents in external intercostal motoneurones of the cat. J. Physiol. (Lond.) 322, 287–314 (1982a)

    Google Scholar 

  • Kirkwood, P.A., Sears, T.A.: The effects of single afferent impulses on the probability of firing of external intercostal motoneurones in the cat. J. Physiol. (Lond.) 322, 315–336 (1982b)

    Google Scholar 

  • Kirkwood, P.A., Sears, T.A., Westgaard, R.H.: Recurrent inhibition of intercostal motoneurones in the cat. J. Physiol. (Lond.) 319, 111–130 (1981)

    Google Scholar 

  • Koehler, W., Hamm, T.M., Enoka, R.M., Stuart, D.G., Windhorst, U.: Contractions of single motor units are reflected in membrane-potential changes of homonymous alpha-motoneurones. Brain Res. (1984a, in press)

  • Koehler, W., Hamm, T.M., Enoka, R.M., Stuart, D.G., Windhorst, U.: Linear and nonlinear summation of alpha-motoneurone potential changes elicited by contractions of homonymous motor units in cat medial gastrocnemius. Brain Res. (1984b, in press)

  • Koehler, W., Windhorst, U.: Multi-loop representation of the segmental muscle stretch reflex. Biol. Cybern. 38, 51–61 (1980)

    Google Scholar 

  • Koehler, W., Windhorst, U.: Frequency response characteristics of a multi-loop representation of the segmental muscle reflex. Biol. Cybern. 40, 59–70 (1981)

    Google Scholar 

  • Kranz, H., Baumgartner, G.: Human alpha motoneurone discharge, a statistical analysis. Brain Res. 76, 324–329 (1974)

    Google Scholar 

  • Kukulka, C.G., Clamann, H.P.: Comparison of the recruitment and discharge properties of motor units in human brachial biceps and adductor pollicis during isometric contractions. Brain Res. 219, 45–55 (1981)

    Google Scholar 

  • Lüscher, H.-R., Ruenzel, P., Henneman, E.: Topographic distribution of terminals of Ia and group II fibres in spinal cord, as revealed by postsynaptic population potentials. J. Neurophysiol. 43, 968–985 (1980)

    Google Scholar 

  • McKeon, B., Burke, D.: Muscle spindle discharge in response to contractions of single motor units. J. Neurophysiol. 49, 291–302 (1983)

    Google Scholar 

  • Mori, S.: Discharge patterns of soleus motor units with associated changes in force exerted by foot during quiet stance in man. J. Neurophysiol. 36, 458–471 (1973)

    Google Scholar 

  • Mori, S.: Entrainment of motor-unit discharges as a neuronal mechanism of synchronization. J. Neurophysiol. 38, 859–870 (1975)

    Google Scholar 

  • Murthy, K.S.K. Physiological identification of static β axons in primate muscle. Exp. Brain Res. 52, 6–8 (1983)

    Google Scholar 

  • Nelson, S.G., Mendell, L.M.: Projection of single knee flexor Ia fibers to homonymous and heteronymous motoneurons. J. Neurophysiol. 41, 778–787 (1978)

    Google Scholar 

  • Perkel, D.H., Gerstein, G.L., Moore, G.P.: Neuronal spike trains and stochastic point processes. I. The single spike train. Biophys. J. 7, 391–418 (1967)

    Google Scholar 

  • Rapoport, S.: Reflex connexions of motoneurones of muscles involved in head movement in the cat. J. Physiol. (Lond.) 289, 311–327 (1979)

    Google Scholar 

  • Richmond, F.J.R., Abrahams, V.C.: Morphology and enzyme histochemistry of dorsal muscles of the cat neck. J. Neurophysiol. 38, 1312–1321 (1975a)

    Google Scholar 

  • Richmond, F.J.R., Abrahams, V.C.: Morphology and distribution of muscle spindles in dorsal muscles of the cat neck. J. Neurophysiol. 38, 1322–1339 (1975b)

    Google Scholar 

  • Rymer, W.Z., Hasan, Z.: Prolonged time course for vibratory suppression of stretch reflex in the decerebrate cat. Exp. Brain Res. 44, 101–112 (1981)

    Google Scholar 

  • Schwestka, R., Windhorst, U., Schaumberg, R.: Patterns of parallel signal transmission between multiple alpha efferents and multiple Ia afferents in the cat semitendinosus muscle. Exp. Brain Res. 43, 34–46 (1981)

    Google Scholar 

  • Shiavi, R., Negin, M.: Stochastic properties of motoneuron activity and the effect of muscular length. Biol. Cybern. 19, 231–237 (1975)

    Google Scholar 

  • Stiles, R.N.: Frequency and displacement amplitude relations for normal hand tremor. Am. J. Physiol. 40, 44–54 (1976)

    Google Scholar 

  • Stiles, R.N.: Mechanical and neural feedback factors in postural hand tremor of normal subjects. J. Neurophysiol. 44, 40–59 (1980)

    Google Scholar 

  • Stiles, R.N.: Lightly damped hand oscillations: acceleration-related feedback and system damping. J. Neurophysiol. 50, 327–343 (1983)

    Google Scholar 

  • Sypert, G.W., Fleshman, J.W., Munson, J.B.: Comparison of monosynaptic actions of medial gastrocnemius group Ia and group II muscle spindle afferents on triceps surae motoneurons. J. Neurophysiol. 44, 726–738 (1980)

    Google Scholar 

  • Swett, J.E., Eldred, E.: Relation between spinal level and peripheral location of afferents in calf muscles of the cat. Am. J. Physiol. 196, 819–823 (1959)

    Google Scholar 

  • Swett, J.E., Eldred, E., Buchwald, J.S.: Somatotopic cord-to-muscle relations in efferent innervation of cat gastrocnemius. Am. J. Physiol. 219, 762–766 (1970)

    Google Scholar 

  • Taylor, A.: The significance of grouping of motor unit activity. J. Physiol. (Lond.). 162, 259–269 (1962)

    Google Scholar 

  • Young, R.R., Hagbarth, K.-E.: Physiological tremor enhanced by manoeuvres affecting the segmental stretch reflex. J. Neurol. Neurosurg. Psychiat. 43, 248–256 (1980)

    Google Scholar 

  • Windhorst, U.: Considerations on mechanisms of focussed signal transmission in the multi-channel muscle stretch reflex system. Biol. Cybern. 31, 81–90 (1978)

    Google Scholar 

  • Windhorst, U.: Auxiliary spinal networks for signal focussing in the segmental stretch reflex system. Biol. Cybern. 34, 125–135 (1979a)

    Google Scholar 

  • Windhorst, U.: A possible partitioning of segmental muscle stretch reflex into incompletely de-coupled parallel loops. Biol. Cybern. 34, 205–213 (1979b)

    Google Scholar 

  • Windhorst, U., Niemann, U., Koehler, W.: Analysis of nonlinear physiological systems with single or multiple spike inputs and analogue or spike outputs. Biol. Cybern. 48, 159–163 (1983)

    Google Scholar 

  • Windhorst, U., Schwestka, R.: Interactions between motor units in modulating discharge patterns of primary muscle spindle endings. Exp. Brain Res. 45, 417–427 (1982)

    Google Scholar 

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Windhorst, U. Neural activity states in different forms of physiological tremor. Facts and hypotheses. Biol. Cybern. 50, 143–154 (1984). https://doi.org/10.1007/BF00337161

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