Results of Time Series Analysis on Spontaneous Motor Activity in Mice
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概要
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To obtain information on the physiology of mice, the amount of spontaneous motor activity was measured in these animals. Then, its periodic rhythm was examined by time series analysis.<BR>Spontaneous motor activity was measured chronologically in three groups of mice by means of three apparatuses, Animex (group A), Wheel (group W), and Photo-Cell (group P), respectively. When its amount was subjected to correlogram analysis, the spontaneous motor activity formed the vibratory wave of a circular model consisting of several fluctuations of periodic variation. This vibratory wave composed of a large wave with its peak at 24 hours of the dark phase, regardless of the apparatus used, and such a small wave with its peak at 12 hours of the light phase as shown in groups A and P. These peaks appeared repeatedly in 24 hours and were considered to present a diurnal rhythm. Moreover, a small wave was observed in groups A and W. It seemed to appear at 24 hours' intervals at about the time of transition into the dark or into the light phase.<BR>Periodic components were examined by power spectrum analysis. The highest spectrum was observed in groups A and P at about 4 hours and in group W at about 2 hours. Small spectra were noticed in groups A and P at about 2 and 6 hours and in group W at about 6 and 8 hours.<BR>It was interpreted that in the spontaneous motor activity of mice such vibratory waves as induced at there periodic times were synthesized and united into a diurnal rhythm.<BR>From the results mentioned above it was concluded that a simultaneous use of correlogram analysis and power spectrum analysis was an effective means for time series analysis on spontaneous motor activity in mice.
- 獣医疫学会の論文
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