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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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Reflex Contributions to the Control of Head Movement in the Lizard

Reflex Contributions to the Control of Head Movement in the Lizard

Chapter:
(p.91) Chapter 11 Reflex Contributions to the Control of Head Movement in the Lizard
Source:
The Head-Neck Sensory Motor System
Author(s):

Dave H. B. Wang

John H. Anderson

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0011

There are some tough problems in comprehending the control of head movements. The head-neck system is multijointed and the posture and the movement of the head can be controlled by distinct pairs of muscles that may subserve the same functions or help to perform a particular task. There seems to be considerable redundancy. The behavioral degrees of freedom are few, yet simple movements such as rotating the head may result from the contraction of many muscles acting in a coordinated manner manifesting the necessity for some constraints. Another problem is that different tasks may need to be performed and the organization of the sensory inputs and the motor outputs must be appropriate for a particular task, such as controlling gaze or posture or both at the same time.

Keywords:   head movements, head-neck system, muscles, degrees of freedom, sensory inputs, motor outputs

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