Studies of Bruxism during Sleep. Development of Analyzing System in Biological Phenomena during Sleep.:—Development of Analyzing System in Biological Phenomena during Sleep—
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In this experiment, in order to analyze the relationship between bruxism and sleep condition with swift and ease, an attempt was made to develop a biologic phenomena analyzing system that would analyze the relation between bruxism and brain wave sleep stages during sleep at night. Using a wireless telemeter (WEE-6112, WEB-5000, Nihon Koden, Japan), the EEGs, EOGs, ECGs, EMGs of masseter muscle, EMGs of mental muscle and respirogram were recorded simultaneously throughout the night. By using the sleep brain wave analyzing equipment (DEE-1100, Nihon Koden, Japan), sleep stages were determined every 30 seconds from the brain wave and classified. Bruxism was measured as the masseter muscular activities that were taken from the middle portion of the bilateral masseter muscles, had a burst that was larger than that of swallowing action taken before sleep, and either had the interval between the bursts less than 5 seconds or had a burst that lasted longer than 5 seconds.<BR>A program in which the data of the brain wave sleep stages of every 30 seconds and the appearance of bruxism from the time one goes to sleep to the time one gets up were inputted was prepared. By using such programs it was possible to overlap display the course of the transition of brain wave sleep stages and the appearance of bruxism during sleep at night, and to visually observe the manner in which brain wave sleep stages shift due to the appearance of Bruxism. At the same time it was possible to perform quantitative evaluations such as the change of sleep stages due to bruxism, the number and frequency of appearance of bruxism at each sleep cycle, the number of bruxism at each sleep cycle and sleep stages. Thus we were able to develop a system that would quantitatively and visually evaluate the relation between bruxism and brain wave sleep stages.
- 日本顎口腔機能学会の論文
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