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Biological Cybernetics

, Volume 80, Issue 2, pp 103–108 | Cite as

Dependence of peripheral tremor on mechanical perturbations: a modeling study

  • Otmar Bock
  • Nicole Wenderoth
Article

Abstract.

The present study scrutinizes the popular view that tremors of central origin but not those of peripheral origin are largely resistant to mechanical perturbations. We explore the effects of perturbations in a well-established model of peripheral tremor and document that (a) tremor frequency can remain unchanged when spring or weight loads are added, (b) entrainment by external drives can be limited to drives of similar frequency, and (c) resetting of tremor phase by torque pulses can remain fractional. This resistance to mechanical perturbations arises in the model because peripheral neuromuscular dynamics act as a limit-cycle oscillator which, by its very nature, will absorb moderate changes to signals and parameters. We conclude from our study that resistance to mechanical perturbations is not an exclusive property of central tremors, but rather may also be found in peripheral tremors. Other criteria are therefore needed to distinguish between different origins of tremor.

Keywords

Torque Similar Frequency Moderate Change Weight Load Central Origin 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Otmar Bock
    • 1
  • Nicole Wenderoth
    • 1
  1. 1.Department of Physiology, German Sport University, D-50927 Köln, GermanyDE

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