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KMID : 0603920090170040071
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Journal of Korean Academy of Occupational Therapy
2009 Volume.17 No. 4 p.71 ~ p.79
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The Effects of Different Head Angles on Suprahyoid Muscle Activation
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Woo Hee-Soon
Chang Ki-Yeon
Chon Seung-Chul
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Abstract
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Objective : This research was carried out for the purpose of creating clinical applications for improving the swallowing function by comparing suprahyoid muscle activation at different head angles.
Methods : Volunteers were collected among students attending OO university in Daejeon, Gwangyeok-si, and 39 subjects 394 males and 15 females) participated in the experiment. The neutral position (a head flexion of 0°) was set with a base angle of the Frankfort horizontal plane parallel to the Earth’s sus 394; after confiering a 15°inferior and superior head angle through an X-ray scty ie39h anguas position (head flexion 0°, head flexion 15°and head extension 15°) was tested for 3 dry swallowing and wet swallowing attempts (a 10 second break after 1 swallow).
Results : In both dry and wet swallowing, a 15°flexion of the head angle activates the suprahyoid muscles more than in the neutral position, while a 15°stretching of the head angle did not have a statistically significant effect on swallowing.
Conclusion : Swallowing induced at a flexed head angle position can more greatly activate the suprahyoid muscles and mobilize the hyoid bone; therefore, this is suggested as a safe way of eating.
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KEYWORD
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Head angle, Head flexion, Muscle activation, Suprahyoid muscles
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