The Spontaneous Physical Activity (SPA) can be responsible for variations of a lot of physiological parameters at the molecular, cellular, tissue, and systemic levels. It is increasingly recognized that the good understanding of a large part of laboratory experimentations, implies to weight results by this SPA in order to reduce the variability, and so to decrease the number of animals necessary to conduct a study. However, because of the high cost of these equipment, only few laboratories are equipped with such a device to measure the SPA of their animals. Here, we present an effective, adaptable and low-cost system to measure SPA in rodents, based on a video acquisition of the animal in his own environment.
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