Influence of Forward Head Posture on Electromyography Activity of Hyoid Muscles During Mouth Opening

• 발행기관: 한국전문물리치료학회
• 저자명: Jae-ik Song Sun-young Kang Joo-hee Park Heon-seock Cynn Hye-seon Jeon
• 간행물 정보: 『한국전문물리치료학회지』한국전문물리치료학회지 제22권 제1호, 103~109쪽, 전체 7쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2015.02.19

영문 초록

Although the relationship between temporomandibular disorder and forward head posture (FHP) is controversial, it is generally accepted that altered head posture can affect mandible position and masticatory muscles activity. Because suprahyoid (SH) and infrahyoid (IH) muscles are stretched by increased passive tension in FHP, this study investigated their activity during mouth opening in FHP compared to neutral head posture (NHP). Twenty healthy subjects (10 males and 10 females) participated in this study. Head postures were evaluated with a cervical range of motion instrument. Electromyography (EMG) activity of bilateral SH and IH muscles was measured while an open mouth was maintained at each head posture. Paired t-test was used to identify significant differences in normalized EMG activity between head postures. Statistical significance was set at .01. Results showed the normalized EMG activity of SH and IH muscles were significantly lower in FHP compared to NHP. This finding indicates that FHP affects the EMG activity of hyoid muscles when they are stretched.

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키워드

Forward head posture Hyoid muscles Temporomandibular disorder