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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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Head-Trunk Coordination in Man: Is Trunk Angular Velocity Elicited by a Support Surface Movement the Only Factor Influencing Head Stabilization?

Head-Trunk Coordination in Man: Is Trunk Angular Velocity Elicited by a Support Surface Movement the Only Factor Influencing Head Stabilization?

Chapter:
(p.571) Chapter 92 Head-Trunk Coordination in Man: Is Trunk Angular Velocity Elicited by a Support Surface Movement the Only Factor Influencing Head Stabilization?
Source:
The Head-Neck Sensory Motor System
Author(s):

John H. J. Allum

Flurin Honegger

Emily A. Keshner

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0092

This chapter's objective is to answer the question about the coordination of head and trunk movements as to whether head movements follow those of the trunk, as a passive mass-spring-dashpot system would. Three important factors of postural control must be analyzed, including the definition of head stabilization, the fact that the displacement of body segments set in motion may be greater than the muscles' available contractile forces, and the possibility that the presence of rapid adaptation of neck extensor responses to successive platform rotations may represent switching to a head stabilization regulation mode. The purpose of this study is to clarify these issues and determine the degree to which the passive biomechanical properties may dominate the head movements on the trunk.

Keywords:   head stabilization, postural control, head movement, body segments, neck extensor responses, biomechanical properties

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