下顎および手指の音刺激に対応するタッピング運動の解析 : 無歯顎者と有歯顎者の比較 [in Japanese] Comparison of Orofacial and Hand-Tapping Movements in Edentulous and Normal Dentulous Subjects [in Japanese]
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The correlation between movements of the mandible and hand in response to auditory signals were studied to compare motor skills in the orofacial structures and upper extremities.<BR>Ten dentulous young adults and 2 geriatric edentulous patients (one, who was not adapted: A, another, who was well adapted to complete denture wearing: B) were asked to make tapping movements of the mandible or hand in synchronization with auditory signals generated at regular intervals of 1.3 time/sec. While tapping, the markers on the menton (Me) and fingertip (Ft) were recorded on videotape using 2 high-speed video cameras from frontal and lateral perspectives. The movements of each marker were automatically tracked, and the resulting data of the 3-dimensional coordinates was constructed. Then, the trajectory of each monitored point was computed using a 3-dimensional analyzer (Movias 3D) with reference to the following parameters: total length from start to finishof the trajectory (TL); distance between start and finish of the trajectory (SL); TL to SL ratio (T/S); volume of the rectangular solid encompassing the entire trajectory (Cub); the 3-dimensional angles created by the difference in the direction of the preceding and subsequent trajectories at each measured time (TH); and velocity (V).<BR>The following results were observed: The time-lag between the auditory signal and Ft movement in the edentulous subjects (A, B) was greaterthan that of the dentulous subjects (N). Although the time-lag between the signal and Me movement in B was similar to that of N, the time-lag in A was greater than in N and B.<BR>In both A and B, during the down phases of Ft, Cub, TL, SL and V were smaller and TH was greater than that in N. During the closing phases of Me in A, Cub, TL, SL and V were remarkably greater than that in N, however, in B, only T/S was smaller than in N and the others were almost within the range of1 SD of N.
- Nihon Hotetsu Shika Gakkai Zasshi
Nihon Hotetsu Shika Gakkai Zasshi 42(1), 20-29, 1998-02-01
Japan Prosthodontic Society