Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Effect of Head Posture and Breathing Pattern on Muscle Activities of Sternocleidomastoid and Scalene during Inspiratory Respiration

흡기 호흡 시 머리자세와 호흡패턴이 목빗근과 목갈비근의 근활성도에 미치는 영향

  • Koh, Eun-Kyung (Department of Physical Therapy, Masan University) ;
  • Jung, Do-Young (Department of Physical Therapy, College of Tourism & Health Science, Joongbu University)
  • 고은경 (마산대학교 물리치료학과) ;
  • 정도영 (중부대학교 물리치료학과)
  • Received : 2013.07.31
  • Accepted : 2013.09.16
  • Published : 2013.09.30
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Abstract

The purpose of this study was to determine the effect of head posture and respiratory pattern on muscle activities of sternocleidomastoid (SCM) and scalene during maximal respiration. The seventeen subjects with upper-costal breathing pattern were participated in this study. Surface electromyography was used to measure the muscles activities of SCM and scalene. The volume and velocity of inspiration were monitored by using the spirometer in each subject. Each subject was performed the 3-cycle of respiration in each condition. The mean values of three peak muscle activity in each muscle were used in the data analysis. A2 (head posture: forward head posture: FHP vs. neutral posture) X 2 (breathing pattern: costal vs. diaphragmatic) repeated-measures analysis of variance (ANOVA) was used to compare the normalized muscle activities of the SCM and scalene. The results showed that the muscle activities of SCM and scalene in diaphragmatic breathing were significantly lower than those in costal breathing for each head posture (p<.0125). The muscle activities of SCM in neutral position were lower than those in forward head position during costal breathing (p<.0125). The diaphragmatic breathing in neutral position of head is recommended to decrease the tension of the accessory inspiratory muscles during respiration in neck-pain patients with FHP.

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References

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