Nutating Annular Cage for Measuring Motor Activity

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Science  22 Mar 1963:
Vol. 139, Issue 3560, pp. 1224-1225
DOI: 10.1126/science.139.3560.1224


The construction of an activity-measuring device that utilizes a nutating annular animal enclosure is described. The instrument converts motor activity to numerical scores. With mice, the logarithms of these scores assume a normal distribution. A second test occurring 1 day, week, or month after the first fails to exhibit any habituation of the animals.