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J Phys Ther Sci. 2015 Mar;27(3):659-61. doi: 10.1589/jpts.27.659. Epub 2015 Mar 31.

The effect of cocontraction of the masticatory muscles during neck stabilization exercises on thickness of the neck flexors.

Author information

1
Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan, Republic of Korea.
2
Department of Physical Therapy, College of Health Medicine, Kaya University, Republic of Korea.

Abstract

[Purpose] The purpose of this study was to determine the effect of the cocontraction of masticatory muscles during neck stabilization exercises on changes in the thickness of the neck flexors. [Subjects and Methods] Twenty subjects performed neck stabilization only exercise and neck stabilization exercise with simultaneous contraction of the masticatory muscles. Changes in the thickness of the longus colli and sternocleidomastoid were then measured by ultrasound. [Results] The thickness of the longus colli increased significantly fallowing cocontraction of the masticatory muscles and neck stabilization exercise, whereas the exercise method used had no significant effect on the thickness of the sternocleidomastoid. [Conclusion] Cocontraction of the masticatory muscles during neck stabilization exercise is helpful in increasing the thickness of longus colli muscle.

KEYWORDS:

Masticatory muscle; Neck stabilization exercises; Thickness of neck flexors

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