| 研究実績の概要 |
The overall goal of this study was undertaken to demonstrate the importance of the versatile evaluation of articulatory function in cleft lip and palate (CLP) from central and peripheral perspectives.
Following results were obtained: using 3D MRImovie, the articulatory movements in the midsagittal, horizontal and coronal planes were observed in a volumetric image of the 3-D MRI movie. Visualizing the articulation in sagittal plane the dorsum of tongue elevate to contact the palate and the soft palate elevate move backward contacting the posterior pharyngeal wall to produce the consonant sound of /k/. At the same time, the lips contact during rest on coronal view and during horizontal view the lateral and posterior pharyngeal wall were practically unmoving in health volunteers. However in CLP patient with compensatory misarticulation (CMA) those movements differ, the tongue don’t elevate to produce the consonant, but move backward, the soft palate present short length and the lateral and posterior pharyngeal wall present a compensatory movement to produce the velopharyngeal closure; besides using fMRI technique, in the overt task (O-task), motor-related areas including the premotor and primary sensorimotor cortices and the cerebellum were activated in CLP participants without CMA, which generally resembled the activation patterns in healthy participants, however the activation patterns for articulation was different between CLP subjects with CMA. In the covert task (C-task), there were no significant differences in the activation patterns between participants.
|
