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Accession number;00A1054535
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| Title;Articulatory Movements of Lateral Articulation. Observation with Ultrasonic Tomography. (Second Report). |
| Author;
ISHIGE MIYOKO
(Todai Daigakuin Igakukeikenkyuka)
ABE MASAKO
(Univ. of Tokyo, Fac. of Med.)
NIIMI SEIJI
(Todai Daigakuin Igakukeikenkyuka)
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Journal Title;Japan Journal of Logopedics and Phoniatrics
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Journal Code:Z0214B
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ISSN:0030-2813
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VOL.41;NO.4;PAGE.342-351(2000)
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| Figure&Table&Reference;FIG.18, TBL.1, REF.19 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In the present study, the articulatory movements of lateral articulation before and after speech therapy were investigated using ultrasonic tomography and dynamic palatography. The subjects included the four cases reported in the previous study and one additional case in which expiratory airflow is discharged from the left side; the other four cases showed expiratory airflow from the right side. Results were as follows. 1) Observation by ultrasonic tomography showed that first the tongue moves upward, after which the edge of the posterior portion of the tongue on the same side as the airflow moves rapidly downward during lateralized segments in stops and affricates. The same portion of the tongue moves slightly downward in fricatives and vowels. The movements of the tongue edge were symmetrical in normal articulation after speech therapy. 2) Observation by dynamic palatography showed that the tongue continues to contact with the hard palate during lateral articulation, while there was a space at the center of the oral cavity during normal articulation after speech therapy. These results show that the edge of the posterior portion of the tongue on the side of expiratory airflow makes the main contribution to the production of the pathological speech sounds of lateral articulation. Since with lateral articulation the elevated tongue blocks the midline channel for expiratory airflow, production of speech sounds is thought to be accomplished by expiratory airflow between the buccal mucosa and dental arch. (author abst.) |
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