定頻度反復音信号負荷が下顎tapping運動に及ぼす影響

概要

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Influence of a repetitive commanded acoustic signal with constant frequency of 1.3 Hz on jaw tapping movement was studied. 10 healthy subjects were made to perform anticipated jaw tapping movement corresponding to the signal. Jaw tapping movement with and without signal were analyzed for their opening distance and a ratio of duration of opening phase I (depressing phase), opening phase If (plateau phase), closing phase and tooth contact phase to the cycle time. 1. Opening distance in loaded tapping was shorter than that in the tapping ad lib. (P≒0.01), and independently of commanded signal it became to be longer with increasementof trial numbers (P≒0.0l). 2. The ratio of duration of tooth contact phase in loaded tapping became smaller with increasement of the trials, although that in the tapping ad lib. be came greater (P<0.001). 3. The ratio of duration of opening phase I in loaded tapping became greater with increasement of the trials, while that in the tapping ad lib. became smaller (P≒0.01). 4. It could be interpreted that in the loaded tapping "an instant performance controll" acted from the beginning of the trials and the signal might make it facile or easy to detect and confirm errors in movement.
日本補綴歯科学会の論文
1989-06-01