| Project/Area Number |
15500392
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Rehabilitation science/Welfare engineering
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| Research Institution | NIIGATA UNIVERSITY OF HEALTH AND WELFARE |
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Principal Investigator |
OHASHI Yasushi NIIGATA UNIVERSITY OF HEALTH AND WELFARE, DEPARTMENT OF SPEECH THERAPY, PROFESSOR, 医療技術学部・言語聴覚学科, 教授 (30013874)
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| Co-Investigator(Kenkyū-buntansha) |
ISONO Sinsaku NIIGATA UNIVERSITY OF HEALTH AND WELFARE, DEPARTMENT OF SPEECH THERAPY, PROFESSOR, 医療技術学部・言語聴覚学科, 教授 (10168289)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | dysphagia / suprahyoid muscles / low frequency treatment / videoendoscopy / swallowing movement |
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| Research Abstract |
The availability of therapeutic techniques in the rehabilitation of swallowing disorders is limited in the oral and pharyngeal phases of severe dysphagia. Massage-induced relaxation is useful in the treatment of hand and foot muscle dysfunction and may be useful in treating dysphagia. Using videoendoscopy, we examined and verified the potential of low frequency stimulation as a treatment for swallowing disorders. This research examined whether this treatment could facilitate coordination between lingual muscles and suprahyoid muscles and promote recovery of swallowing.
Velopharyngeal movement and swallowing function were observed in 24 patients with dysphagia at Niigata Rehabilitation Hospital, which has a functional affiliation with our university.
Low frequency electrodes were mounted on the neck skin between the chin and the thyroid cartilage in two healthy adults. Stimulation frequency of 40 Hz at intensity of 32 -56 V was applied, resulting in repetitive contraction of suprahyoid muscles. Movement of the swallowing organs was observed by videoendoscopy.
With this low frequency treatment, slight elevation of the tongue base and inversion of the epiglottis, adduction of the arytenoids cartilage, partial closure of the glottis and opening of pyriform sinuses were observed. Videoendoscopic observation was useful for determining the optimal placement of electrodes in the facilitation area.
Repetitive contraction of swallowing muscles by low frequency treatment can elicit the initiation of the swallowing reflex. The resulting coordination of the swallowing musculature suggests that low frequency treatment may be effective for severe oral and pharyngeal phase dysphagia.
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