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The Nature of Voluntary Control of Motor Actions

  • Anatol G. Feldman
Chapter

Abstract

Natural laws express the relationships between certain variables called state variables. Constrained by natural laws these variables cannot be specified directly by the nervous system, as illustrated by the failure of the force control theory that relies on the idea of direct programming of kinematics and muscle torques. Natural laws include parameters, some of which are not conditioned by these laws but define essential characteristics of the system’s behavior under the action of these laws. This implies that the neural control of motor actions involves changes in parameters of the system. This strategy allows the nervous system to take advantage of natural laws in producing the desired motor output without actually knowing these laws or imitating them in the form of internal models. A well established form of parametric control—threshold control—is briefly reviewed with a major focus on how it helps to solve several motor problems, in particular, the problem of the relationship between posture and movement and redundancy problems in the control of multiple muscles and joints.

Keywords

Threshold Control Suspension Point Passive Torque Multiple Muscle Redundancy Problem 
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.

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References

  1. Asatryan D.G., Feldman A.G. (1965) Functional tuning of the nervous system with control of movements or maintenance of a steady posture: I. Mechano-graphic analysis of the work of the joint on execution of a postural tasks, Biophysics, 10, 925–935.Google Scholar
  2. Feldman A.G., Levin M.F. (1995) The origin and use of positional frames of reference in motor control. Behavioral Brain Sciences, 18, 723–806.CrossRefGoogle Scholar
  3. Feldman A.G. (2005) Equilibrium point control. In Encyclopedic reference of neuroscience. In press.Google Scholar
  4. Feldman A.G., Latash M.L. (2005) Testing hypotheses and the advancement of science: Recent attempts to falsify the equilibrium-point hypothesis. Exp. Brain Res. In press.Google Scholar
  5. Ghafouri M., Archambault P.S., Adamovich S.V., Feldman A.G. (2002) Pointing movements may be produced in different frames of reference depending on the task demand, Brain Research, 929, 117–128.PubMedCrossRefGoogle Scholar
  6. Gribble P.L., Ostry D.J. (2000) Compensation for loads during arm movements using equilibrium-point control. Exp Brain Res. 135: 474–482.PubMedCrossRefGoogle Scholar
  7. Gunther M., Ruder H. (2003), Synthesis of two-dimensional human walking: a test of the lambda-model, Biological Cybernetics, 89, 89–106.PubMedCrossRefGoogle Scholar
  8. Latash ML (1993) Control of Human Movement. Human Kinetics: Urbana, IL.Google Scholar
  9. Lestienne F.G., Thullier F., Archambault P., Levin MF., Feldman A.G. (2000) Multi-muscle control of head movements in monkeys: the referent configuration hypothesis, Neuroscience Letters, 283, 65–68.PubMedCrossRefGoogle Scholar
  10. Levin M.F., Dimov M. (1997) Spatial zones for muscle coactivation and the control of postural stability, Brain Research, 757, 43–59.PubMedCrossRefGoogle Scholar
  11. Matthews P.B.C. (1959) A study of certain factors influencing the stretch reflex of the decerebrated cat, J Physiology (London), 147, 547–564.Google Scholar
  12. Ostry D.J., Feldman A.G. (2003) A critical evaluation of the force control hypothesis in motor control, Exp. Brain Res. 153, 275–288.PubMedCrossRefGoogle Scholar
  13. St-Onge N., Feldman A.G. (2004) Referent configuration of the body: a global factor in the control of multiple skeletal muscles, Exp. Brain Res. 155, 291–300.PubMedCrossRefGoogle Scholar
  14. Von Holst E., Mittelstaedt H. (1950) Daz reafferezprincip. Wechselwirkungen zwischen Zentralnerven-system und Peripherie, Naturwiss., 37, 467–476, English Transl., The reafference principle, in: The behavioral physiology of animals and man. The collected papers of Erich von Holst. Martin R (translator) University of Miami Press, Coral Gables, Florida, 1971, pp. 139–173.Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Anatol G. Feldman
    • 1
  1. 1.Department of physiologyUniversity of MontrealCanada

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