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http://dx.doi.org/10.14474/ptrs.2020.9.4.302

Correlation between contraction ratio, endurance, and muscle tone of cervical muscles  

Hong, Ji-Hee (Department of Physical Therapy, Konyang University)
Lee, Dong-Hyeon (Department of Physical Therapy, Konyang University)
Kim, Seong-Eun (Department of Physical Therapy, Konyang University)
Seo, Dong-kwon (Department of Physical Therapy, Konyang University)
Publication Information
Physical Therapy Rehabilitation Science / v.9, no.4, 2020 , pp. 302-308 More about this Journal
Abstract
Objective: The endurance and strength of deep neck flexor (DNF) muscles have a major role on the function and stability of the cervical spine. In recent years, there has been a lack of research that have investigated the muscle tone of the superficial neck muscles. The purpose of this study was to examine the relationship of between contraction ratio of the DNF and sternocleidomastoid (SCM) muscles, DNF endurance, and muscle tension of the neck muscles. Design: Cross-sectional study. Methods: Forty-seven subjects (male=20, female=27) participated in this study. The muscle tone of the upper trapezius (UT), SCM, and suboccipital (SO) muscle was measured using a contact soft tissue tone-measuring instrument. For the contraction ratio of the SCM and longus colli muscle, the thickness of the relaxation and maximum contraction state of the SCM and longus colli muscles were assessed using a diagnostic ultrasound measuring instrument and a pressure biofeedback unit. The deep neck flexor endurance test (DNFET) was performed in a cranio-cervical flexion posture. The correlations between the measured variables were investigated. Results: The relationship between the DNFET and SO tone showed a significant negative correlation (p<0.05). The relationship between the DNFET and contraction ratio showed a significant positive correlation (p<0.01). There was no significant correlation between the DNFET and SCM and UT tone. Conclusions: This study confirmed that there is a relationship between DNF endurance, DNF activation, and SO tone. The information on the results of this study may be used as a reference that can be actively applied in the clinical environment.
Keywords
Endurance; Muscle tonus; Neck muscle; Ultrasonography;
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Times Cited By KSCI : 2  (Citation Analysis)
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