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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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Heterogeneous Structure and Function among Intervertebral Muscles

Heterogeneous Structure and Function among Intervertebral Muscles

Chapter:
(p.141) Chapter 19 Heterogeneous Structure and Function among Intervertebral Muscles
Source:
The Head-Neck Sensory Motor System
Author(s):

Frances J. R. Richmond

David C. Gordon

Gerald E. Loeb

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0019

Historically, the research on head movement has emphasized the central mechanisms ruling the neck motoneurons activity. In the last decade, however, new knowledge about neck muscles has led to an increasing awareness that muscle properties also affect how these motoneurons must be recruited to achieve the needed head movements. Individual muscles differ in their cross-sectional areas and pulling directions, and they also contain different proportions of fast and slow fiber types and have highly specialized patterns of fiber architecture and motor unit distribution. All these must be taken into consideration when trying to comprehend the neural control of the head movement.

Keywords:   head movement, motoneurons, fiber types, fiber architecture, motor unit distribution, neural control

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