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Comparison of the Thickness of the Neck Flexor Muscles of Subjects With and Without a Forward Head Posture on the Two Initial Head Positions During Cranio-Cervical Flexion Exercise

한국전문물리치료학회지 2015년 22권 4호 p.44 ~ 50
정성훈, 정성훈, 권오윤, 최규환, 하성민, 김수정, 전인철, 황의재, 권오윤, 최규환, 하성민, 김수정, 전인철, 황의재,
소속 상세정보
정성훈 ( Jung Sung-Hoon ) - Kinetic Ergocise Based on Movement Analysis Laboratory
권오윤 ( Kwon Oh-Yun ) - Yonsei University College of Health Science Department of Physical Therapy
최규환 ( Choi Kyu-Hwan ) - Ansan University Department of Physical Therapy
하성민 ( Ha Sung-Min ) - Sangji University College of Health Sciences Department of Physical Therapy
김수정 ( Kim Su-Jung ) - Youngsan University College of Health Sciences Department of Physical Therapy
전인철 ( Jeon In-Cheol ) - Yonsei University Graduate School Department of Physical Therapy
황의재 ( Hwang Ui-Jae ) - Yonsei University Graduate School Department of Physical Therapy
권오윤 ( Kwon Oh-Yun ) - Yonsei University College of Health Science Department of Physical Therapy
최규환 ( Choi Kyu-Hwan ) - Ansan University Department of Physical Therapy
하성민 ( Ha Sung-Min ) - Sangji University College of Health Sciences Department of Physical Therapy
김수정 ( Kim Su-Jung ) - Youngsan University College of Health Sciences Department of Physical Therapy
전인철 ( Jeon In-Chul ) - Yonsei University Graduate School Department of Physical Therapy
황의재 ( Hwang Ui-Jae ) - Yonsei University Graduate School Department of Physical Therapy

Abstract


This study compared the effects of the initial head position (i.e., a HHP versus a relaxed head position) of subjects with and without a FHP on the thickness of the deep and superficial neck flexor muscles during CCF. The study recruited 6 subjects with a FHP and 10 subjects without a FHP. The subjects performed CCF in two different head positions: a HHP, with the head aligned so that the forehead and chin formed a horizontal line, and a relaxed head position (RHP), with the head aligned in a self-selected comfortable position. During the CCF exercise, the thickness of the longus colli (LCo) and the thickness of the sternocleidomastoid (SCM) were recorded using ultrasonography. The thickness of each muscle was measured by Image J software. The statistical analysis was performed with a two-way mixed-model analysis of variance. The thickness of the SCM differed significantly (p<.05) between the subjects with and without FHP. According to a post hoc independent t-test, the change in thickness of the SCM increased significantly during CCF in the subjects with FHP while adopting a HHP compared to that in the subjects without FHP. The change in thickness of the SCM was not significantly different between the two positions in subjects without FHP, and there was no significant change in thickness of the LCo muscle during the CCF exercise according to the initial position in both subjects with and without FHP. The results suggest that CCF should be performed in RHP to minimize contraction of the SCM in ubjects with a FHP.

키워드

Cranio-cervical flexion; Deep neck flexor; Initial head position; Superficial neck flexor

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