Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Muscle spindles in muscle control

IV. Correlation with muscle dynamics

  • 28 Accesses

  • 4 Citations


In a previous paper (Inbar, 1972/III) a new adaptive model was proposed for muscular control. According to that scheme muscle spindles (MS) supply continuous information about the system dynamics. In the present study integral pulse frequency modulation (IPFM) is used to correlate MS afferent signals, recorded from frog sartorius muscle, to the same muscle dynamics, in order to establish the feasibility of the proposed MS role in the adaptive muscle model.

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


  1. Brown,M.C., Matthews,P.B.C.: On the subdivisions of the efferent fibers to muscle spindles into static and dynamic fusimotor fibers. In: Andrew,B.L. (Ed.). Control and innervation of skeletal muscle, pp. 19–31. Edinburgh, E. S. Livingston Ltd., 1966.

  2. Chaplin,R.A., Michalis,B., Coenen,R.: System analysis of biological receptors. Kybernetik 9, 85–95 (1971).

  3. Inbar,G.F., Hsia,T.C., Baskin,R.L.: Parameter identification analysis of muscle dynamics. Math. Biosci 7, 61–79 (1970).

  4. - Odom,B., Wagman,I.H.: Muscle spindles in muscle control: I. Afferent outflow from frog muscle spindles in open and closed loop modes. Kybernetik

  5. - Muscle spindles in muscle control: II. Analysis of muscle servo model. Kybernetik

  6. - Muscle spindles in muscle control: III. Analysis of adaptive system model. Kybernetik

  7. Lee,H.C., Milsum,H.: Statistical analysis of multiunit multipath neural communication. Math. Biosci 11, 181–202 (1971).

  8. Lennerstrand, G.: Position and velocity sensitivity of muscle spindles in the cat: I. Primary and secondary endings deprived of fusimotor activation. Acta physiol. scand. 73–74. (1968).

  9. Li,C.C.: Integral pulse frequency modulated control system. Ph. D. Dissertation, Northwestern University 1961.

  10. Matthews,B.H.C.: The response of a single end organ. J. Physiol. (Lond.) 71, 64–110 (1931).

  11. Popple,R.E., Purple,R.L.: Repetitive firing in receptor neurons. Proc, of the IUPS Congress, Munich 1971.

  12. Roberts,T.D.M.: The nature of the controlled variable in the muscle servo. In: Andrew,B.L. (Ed.) Control and innervation of skeletal muscle, pp. 160–168. Edinburgh; E. S. Livingston Ltd. (1966).

  13. Terzuolo,C.A., Mckean,T.A., Poppele,R.E.: Impulse trains: coding and decoding. In: System analysis approach to neurophysiological problems, pp. 86–92. Minnesota; Brainerd, 1969.

  14. Walløe,L.: Transfer of signals through a second order sensory neuron. Ph. D. Dissertation, Institute of Physiology, University of Oslo (1968).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Inbar, G.F. Muscle spindles in muscle control. Kybernetik 11, 142–147 (1972). https://doi.org/10.1007/BF00270670

Download citation


  • System Dynamic
  • Frequency Modulation
  • Pulse Frequency
  • Muscle Spindle
  • Muscle Control