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Experimental Brain Research

, Volume 14, Issue 3, pp 274–292 | Cite as

Mechanical arrangement and transducing properties of Golgi tendon organs

  • D. G. Stuart
  • C. G. Mosher
  • R. L. Gerlach
  • R. M. Reinking
Article

Summary

  1. 1.

    The mechanical arrangement and transducing properties of Golgi tendon organs in soleus and anterior tibial muscles of anesthetized cats have been studied by noting responses of their Ib afferents to muscle stretch (passive force) and contraction (active force) of small portions of the muscle including functionally isolated motor units.

     
  2. 2.

    Tendon organs were shown to be arranged both in-series and in-parallel with adjacent muscle fibers. There were gradations in these relations, the tightest arrangements involving the response to contraction of a single motor unit, brisk discharge from an in-series receptor and pause in the stretch-activated firing of an in-parallel receptor. Other arrangements included those in which groups of muscle fibers neither directly in-series nor in-parallel with a receptor were still found capable of influencing its firing pattern. If in-series muscle fibers maintained their contraction while in-parallel fibers were also contracting, the receptor usually responded slightly less actively than it did to the in-series force alone.

     
  3. 3.

    Tendon organs were found to have a very low threshold to in-series force developed by muscle contraction. Responses were observed to as little as 0.5 gm of twitch tension. Minimum active force thresholds were similar for the two muscles studied, but thresholds to dynamic stretch were lower for anterior tibial receptors. Division of the dynamic stretch threshold by the minimum active force threshold gave a measure of the extent to which each tendon organ was more sensitive to active than passive force. These values (generally less than 50) did not negate the physiological significance of responses to passive stretch.

     
  4. 4.

    The present data, together with those of Houk and his co-workers (1967, 1971) emphasize that tendon organs can participate in the moment to moment reflex control of normal muscle activity.

     

Key words

Golgi tendon organs Group Ib input Motor control system Posture Locomotion 

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References

  1. Alnaes, E.: Static and dynamic properties of Golgi tendon organs in the anterior tibial and soleus muscles of the cat. Acta physiol. scand.70, 176–187 (1967).Google Scholar
  2. Barker, D.: The innervation of skeletal muscle. In: Myotatic, Kinesthetic and Vestibular Mechanisms, pp. 3–15. Ed. by A.V.S. De Reuck and J. Knight. Boston: Little, Brown and Co. 1967.Google Scholar
  3. Boyd, I.A., Davey, M.R.: Composition of peripheral nerves. Edinburgh-London: Livingstone 1968.Google Scholar
  4. Brandstater, M.E., Lambert, E.H.: Motor unit anatomy: type and spatial arrangement of muscle fibers. Fourth Internat. Congress Electromyography, Brussels Abstracts pp. 10–11, 1971.Google Scholar
  5. Bridgman, C.F.: The structure of tendon organs in the cat: A proposed mechanism for responding to muscle tension. Anat. Rec.162, 209–220 (1968).Google Scholar
  6. Brown, M.C., Matthews, P.B.C.: An investigation into the existence of polyneuronal innervation of individual skeletal muscle fibers in certain hind limb muscles of the cat. J. Physiol. (Lond.)151, 436–567 (1960).Google Scholar
  7. Buller, A.J., Lewis, D.M.: The rate of tension development in isometric tetanic contractions of mammalian fast and slow skeletal muscle. J. Physiol. (Lond.)176, 337–354 (1965).Google Scholar
  8. Cruz, I., Hufschmidt, H.J.: Golgi-sehnenorgane und spinale Koordination der Motorik beim Kaninchen. Electromyographische Untersuchungen. Pflügers Arch. ges. Physiol.275, 121–133 (1962).Google Scholar
  9. Eccles, J.C., Eccles, R.M., Lundberg, A.: Synaptic actions on motoneurones caused by impulses in Golgi tendon organ afferents. J. Physiol. (Lond.)138, 227–252 (1957).Google Scholar
  10. Eccles, R.M., Lundberg, A.: Synaptic actions in motoneurones by afferents which may evoke the flexion reflex. Arch. ital. Biol.97, 199–221 (1959).Google Scholar
  11. Edstrom, L., Kugelberg, E.: Histochemical composition distribution of fibers and fatigability of single motor units. J. Neurol. Neurosurg. Psychiat.31, 424–433 (1968).Google Scholar
  12. Ekstedt, J.: Human single muscle fiber action potentials. Acta physiol. scand.61, Suppl. 226 (1964).Google Scholar
  13. Engberg, I., Lundberg, A.: An electromyographic analysis of muscular activity in the hind limb of the cat during unrestrained locomotion. Acta physiol. scand.75, 614–630 (1969).Google Scholar
  14. Granit, R., Pompeiano, O., Waltman, B.: The early discharge of mammalian muscle spindles at onset of contraction. J. Physiol. (Lond.)147, 399–418 (1959).Google Scholar
  15. Green, D.G., Kellerth, J.-O.: Intracellular autogenetic and synergistic effects of muscle contraction on motoneurons. J. Physiol. (Lond.)193, 73–94 (1967).Google Scholar
  16. Hongo, T., Jankowska, E., Lundberg, A.: The rubrospinal tract. II. Facilitation of interneuronal transmission in reflex paths to motoneurones. Exp. Brain Res.7, 365–391 (1969).Google Scholar
  17. Houk, J.C.: A visco-elastic interaction which produces one component of adaptation in responses of Golgi tendon organs. J. Neurophysiol.30, 1482–1493 (1967).Google Scholar
  18. Houk, J.C., Henneman, E.: Responses of Golgi tendon organs to active contractions of the soleus muscle of the cat. J. Neurophysiol.30, 466–481 (1967).Google Scholar
  19. —, Simon, W.: Responses of Golgi tendon organs to forces applied to muscle tendon. J. Neurophysiol.30, 1466–1481 (1967).Google Scholar
  20. Houk, J.C., Singer, J.J., Henneman, E.: The adequate stimulus for tendon organs with observations on the mechanics of the ankle joint. J. Neurophysiol. (In press) (1971).Google Scholar
  21. Huelsman, L.P.: Handbook of Operational Amplifier Active RC Networks. Burr-Brown, Tucson 1966.Google Scholar
  22. Hunt, C.C., Kuffler, S.W.: Stretch receptor discharges during muscle contraction. J. Physiol. (Lond.)113, 298–315 (1951).Google Scholar
  23. Jansen, J.K.S.: On the functional properties of stretch receptors of mammalian skeletal muscles. In: Myotatic, Kinesthetic and Vestibular Mechanisms, pp. 20–34. Ed. by A.V.S. De Reuck and J. Knight. Boston: Little, Brown and Co. 1967.Google Scholar
  24. —, Rudjord, T.: On the silent period and Golgi tendon organs of the soleus muscle of the cat. Acta physiol. scand.62, 364–379 (1964).Google Scholar
  25. Lundberg, A.: Reflex control of stepping. Nansen Memorial Lecture to Norwegian Academy of Sciences. Oslo: Universitetsforglaget 1969.Google Scholar
  26. Matthews, B.H.C.: Nerve endings in mammalian muscle. J. Physiol. (Lond.)78, 1–53 (1933).Google Scholar
  27. Matthews, P.B.C.: Muscle spindles and their motor control. Physiol. Rev.44, 219–288 (1964).Google Scholar
  28. McPhedran, A.M., Wuerker, R.N., Henneman, E.: Properties of motor units in a homogeneous red muscle (soleus) of the cat. J. Neurophysiol.28, 71–84 (1965).Google Scholar
  29. Mills, L.W., Swett, J.E.: A convenient temperature control system for acute animal preparations. EEG and clin. Neurophysiol.17, 435–437 (1964).Google Scholar
  30. Mosher, C.G., Gerlach, R.L., Stuart, D.G.: Motor units of cat soleus and tibialis anterior muscles. In preparation (1972).Google Scholar
  31. — —, Reinking, R.M., Stuart, D.G.: Properties of anterior tibial tendon organs. Physiologist13, 266 (1970a).Google Scholar
  32. —, Stuart, D.G., Gerlach, R.L., Reinking, R.M.: Relative sensitivity of soleus and anterior tibial tendon organs to active and passive forces. Trans. Amer. neurol. Ass.95, 288–291 (1970b).Google Scholar
  33. Norris, F.H., Irwin, R.L.: Motor unit area in a rat muscle. Amer. J. Physiol.200, 944–946 (1961).Google Scholar
  34. Rack, P.M.H., Westbury, D.R.: The effects of length and stimulus rate on tension in the isometric cat soleus muscle. J. Physiol. (Lond.)204, 433–460 (1969).Google Scholar
  35. Roberts, T.D.M.: Neurophysiology of Postural Mechanisms. New York: Plenum Press 1967.Google Scholar
  36. Stuart, D.G., Goslow, G.E., Mosher, C.G., Reinking, R.M.: Stretch responsiveness of Golgi tendon organs. Exp. Brain Res.10, 463–476 (1970a).Google Scholar
  37. —, Mosher, C.G., Gerlach, R.L., Reinking, R.M.: Selective activation of Ia afferents by transient muscle stretch. Exp. Brain Res.10, 477–487 (1970b).Google Scholar
  38. —, Goslow, G.E., Mosher, C.G., Gerlach, R.L., Reinking, R.M.: Transducing properties and mechanical arrangement of soleus tendon organs. Anat. Rec.166, 385 (1970c).Google Scholar
  39. Stuart, D.G., Mosher, C.G., Gerlach, R.L., Reinking, R.M.: Properties and central connections of tendon organs with special reference to locomotion. In: Research Concepts on Muscle Development and the Muscle Spindle, pp.139–166. Ed. by B. Banker, R. J. Pryzbylsky, J. Van Der Meulen and M. Victor. Amsterdam: Exerpta Medica.Google Scholar
  40. Swett, J.E., Eldred, E.: Distribution and numbers of stretch receptors in medial gastrocnemius and soleus muscles. Anat. Rec.137, 453–460 (1960).Google Scholar
  41. — —, Buchwald, J.S.: Somatotopic cord-to-muscle relations in efferent innervation of cat gastrocnemius. Amer. J. Physiol.219, 762–766 (1970).Google Scholar

Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • D. G. Stuart
    • 1
  • C. G. Mosher
    • 1
    • 2
  • R. L. Gerlach
    • 1
  • R. M. Reinking
    • 1
  1. 1.Department of PhysiologyCollege of Medicine, University of ArizonaTucsonUSA
  2. 2.Division of Neurology Department of MedicineThe Arizona Medical Center University of ArizonaTucsonUSA

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