Biological Cybernetics

, Volume 26, Issue 2, pp 73–79 | Cite as

Model for the β motor stimulation in chelonian muscle spindles

  • M. Naeije
  • A. Crowe


A previously proposed model to simulate the behaviour of the chelonian muscle spindle during mechanical stretch has been extended to include the properties of the spindle during activation of the intrafusal muscle fibres. It is assumed that the overall transfer function of the non-activated spindle can be entirely ascribed to the visco-elastic properties of its intrafusal fibres. It is found that the activated spindle can then be simulated by incorporating a force generator into the visco-elastic model and by accepting stepwise changes in its parameter values at the onset and at the end of fusimotor stimulation. The influence of extrafusal fibre contraction has been accounted for by inserting the Voigt muscle model in parallel with the spindle model.


Muscle Fibre Transfer Function Force Generator Muscle Spindle Mechanical Stretch 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bayly, E.J.: Spectral analysis of pulse frequency modulations in the nervous systems. IEEE Trans. Bio-Med. Eng.15, 257–265 (1968)Google Scholar
  2. Crowe, A., Matthews, P.B.S.: The effects of stimulation of static and dynamic fusimotor fibres on the response to stretching of the primary endings of muscle spindles. J. Physiol.174, 109–131 (1964)Google Scholar
  3. Crowe, A., Ragab, A.H.M.F.: The structure, distribution, and innervation of spindles in the extensor digitorum brevis I muscle of the tortoise. Testudo Graeca. J. Anat.106, 521–538 (1970)Google Scholar
  4. Crowe, A., Ragab, A.H.M.F.: Studies on the fine structure of the capsular region of tortoise muscle spindles. J. Anat.107, 257–269 (1970)Google Scholar
  5. Crowe, A., Ragab, A.H.M.F.: A histochemical investigation of intrafusal fibres in tortoise muscle spindles. J. Histochem. Cytochem.20, 200–204 (1972)Google Scholar
  6. Gestri, G.: Pulse frequency modulation in neural systems, a random model. Biophys. J.11, 98–109 (1971)Google Scholar
  7. Naeije, M., Crowe, A.: The response of the chelonian muscle spindles to mechanical stimulation. Life Sci.15, 131–136 (1974)Google Scholar
  8. Naeije, M., Crowe, A.: Preliminary physiological studies of chelonian muscle spindles. J. Anat.119, 189–190 (1974)Google Scholar
  9. Naeije, M., Crowe, A., de Klerk, H.: Model of the firing frequency of the chelonian muscle spindle. Biol. Cybernetics21, 53–60 (1976)Google Scholar
  10. Naeije, M.: The chelonian muscle spindle. Thesis, Utrecht (1977)Google Scholar
  11. Ottoson, D.: Functional properties of a muscle spindle with no fluid space. Brain Res.41, 471–474 (1972)Google Scholar
  12. Ottoson, D., Shepherd, G.M.: Length changes within isolated frog muscle spindle during and after stretching. J. Physiol.207, 747–759 (1970)Google Scholar
  13. Proske, U., Walker, B.: Responses of muscle spindles in a tortoise. Brain Res.91, 79–88 (1975)Google Scholar

Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • M. Naeije
    • 1
  • A. Crowe
    • 1
  1. 1.Department of Medical and Physiological PhysicsPhysics LaboratoryUtrechtThe Netherlands

Personalised recommendations