The general or spontaneous motor activity of animals is a useful parameter in chronobiology. Modified motion detectors can be used to monitor locomotor activity rhythms. We modified a commercial microwave-based detection device and validated the device by recording circadian and ultradian rhythms.
Dipartimento di Psicologia, Sezione di Neuroscienze, Università di Roma La Sapienza, Via dei Sardi 70, 00185 Roma, Italy. vittorio.pasquali@uniroma1.it