論文詳細
敬心・研究ジャーナル第2巻 第1号
姿勢が発声時の呼吸補助活動に及ぼす影響
大塚裕一2)
宮本恵美2)
古閑公治2)
久保高明2)
船越和美2)
2)熊本保健科学大学
要旨
【はじめに】発声時に活動する呼吸補助筋は姿勢の変化と関連している。本研究の目的は、健常成人を対象に、姿勢の変化が発声時の呼吸補助筋の筋活動に及ぼす影響を明らかにすることとした。
【対象】対象は呼吸器系や筋骨格系、発声器官に既往のない健常成人男性7名とした。【方法】測定姿勢は背臥位、端座位、立位の3姿勢とした。測定項目は最長発声持続時間、発声時の腹直筋、外腹斜筋の筋活動、及び筋活動開始時間とした。【結果】最長発声持続時間は背臥位に比べ端座位と立位で有意に長かった(p<0.01)。立位は端座位に比べ、腹直筋の筋活動が高かった(p<0.05)。発声時の腹直筋、外腹斜筋の活動開始時間では、背臥位は立位、端座位に比べ、活動開始時間が有意に遅くなることが示された(p<0.05)(p<0.01)。【考察・結論】姿勢の違いによって発声時の呼吸補助筋の筋活動には各々の特徴があることが示された。発声練習時の姿勢を検討する一助となることが期待される。
The effect of body position on accessory muscles of respirationactivity at vocalization
Otsuka Yuichi2)
Miyamoto Megumi2)
Koga Hiroharu2)
Kubo Takaaki2)
Funakoshi Kazumi2)
2)KUMAMOTO Health Science University
Abstract
【Introduction】Changes in body position affect the accessory muscles of respiration that are active during vocalization. The purpose of this research is to understand the effects that changes in body position have on the muscular activity of accessory muscles of respiration during vocalization in healthy adults.
【Subjects】The subjects were 7 healthy adult males with no medical history of respiratory, musculoskeletal, or vocal organ issues.
【Methods】Measurements were taken in three positions: supine, seated, and standing. The length of the longest continuous vocalization, and the lengths and starting times of the muscular activity of the rectus abdominis and abdominal external oblique muscles during vocalization were measured.
【Results】The longest continuous vocalization was significantly longer for the sitting and standing positions compared to the supine position (p<0.01). The rectus abdominis muscular activity was higher for standing compared to sitting (p<0.05) positions. In regard to muscle activity starting times for rectus abdominis and abdominal external oblique muscles, starting times were significantly earlier for the sitting and standing positions compared to the supine position (p<0.05)(p<0.01).【Observations / Conclusion】The muscle activity of the accessory muscles of respiration during vocalization differs depending on the body position. This is expected to be of use in deciding on body position when practicing vocalization.