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The Head-Neck Sensory Motor System$
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Alain Berthoz, Werner Graf, and P. P. Vidal

Print publication date: 1992

Print ISBN-13: 9780195068207

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780195068207.001.0001

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Non-linear Dynamics of Involuntary Head Movements

Non-linear Dynamics of Involuntary Head Movements

Chapter:
(p.400) Chapter 61 Non-linear Dynamics of Involuntary Head Movements
Source:
The Head-Neck Sensory Motor System
Author(s):

Jefim Goldberg

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0061

This chapter discusses the sensory-motor origins of involuntary head movements. These movements can be regarded as a continuous sequence of deviations and succeeding corrections effected by sensory-motor mechanisms. This is important in the maintenance of static equilibrium in the vertical posture. The concept of pendulum models of equilibrium dynamics is also discussed in this chapter. It is used to represent the whole-body equilibrium in the upright posture. This model belongs to the general class of second-order dynamic systems. Moreover, the spectral analysis of involuntary head movements is also employed in this chapter. Utilizing the Fourier spectral methods, the head movement is decomposed into a sum of sinusoidal components of different frequencies and amplitudes. Based on the discussion of results, it is concluded that quantitative analysis of movement behaviors would provide a more useful measure of understanding dynamic properties than Fourier methods or other methods.

Keywords:   head movements, Fourier methods, pendulum model, mechanisms, posture, equilibrium

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