{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T08:40:08Z","timestamp":1776847208509,"version":"3.51.2"},"reference-count":18,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2014,9,24]],"date-time":"2014-09-24T00:00:00Z","timestamp":1411516800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Oral Rehabilitation"],"published-print":{"date-parts":[[2015,2]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>Velopharyngeal incompetence is known as a contributing factor to speech disorders. Suwaki <jats:italic>et\u00a0al<\/jats:italic>. reported that nasal speaking valve (<jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content>) could improve dysarthria by regulating nasal emission utilising one\u2010way valve. However, disease or condition which would be susceptible to treatment by <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> has not been clarified yet. This study aimed to evaluate the effect of <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> by questionnaire survey using ready\u2010made <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content>. Subjects were recruited through the internet bulletin, and <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> survey set was sent to the applicant. Sixty\u2010six participants, who agreed to participate in this study, used <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> and mailed back the questionnaire which included self\u2010evaluation and third\u2010party evaluation of speech intelligibility. Statistical analysis revealed that the use of <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> resulted in significant speech intelligibility improvement in both self\u2010evaluation and third\u2010party evaluation (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00\u00b701). Regarding the type of underlying disease of dysarthria, significant effect of <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> on self\u2010evaluation of speech intelligibility could be observed in cerebrovascular disease and neurodegenerative disease (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00\u00b701) and that on third\u2010party evaluation in neurodegenerative disease (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00\u00b701). Eighty\u2010six percent of subjects showed improvement of speech intelligibility by shutting up nostrils by fingers, and the significant effect of <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> on both self\u2010evaluation and third\u2010party evaluation of speech intelligibility was observed (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00\u00b7001). From the results of this study, it was suggested that <jats:styled-content style=\"fixed-case\">NSV<\/jats:styled-content> would be effective in cerebrovascular disease and neurodegenerative disease, as well as in subjects whose speech intelligibility was improved by closing nostrils.<\/jats:p>","DOI":"10.1111\/joor.12237","type":"journal-article","created":{"date-parts":[[2014,9,24]],"date-time":"2014-09-24T09:12:59Z","timestamp":1411549979000},"page":"136-143","source":"Crossref","is-referenced-by-count":1,"title":["Effect of nasal speaking valve on speech intelligibility under velopharyngeal incompetence: a questionnaire survey"],"prefix":"10.1111","volume":"42","author":[{"given":"S.","family":"Mikamo","sequence":"first","affiliation":[{"name":"Department of Occlusal and Oral Functional Rehabilitation Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N.","family":"Kodama","sequence":"additional","affiliation":[{"name":"Department of Occlusal and Oral Functional Rehabilitation Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Q.","family":"Pan","sequence":"additional","affiliation":[{"name":"Department of Occlusal and Oral Functional Rehabilitation Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N.","family":"Maeda","sequence":"additional","affiliation":[{"name":"Department of Occlusal and Oral Functional Rehabilitation Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama 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