In behavior research area, many researchers want to study both the activity and life pattern of an animal at the same time. General speaking, activity can be best quantified through top view analysis (e.g., locomotion), while side view analysis provides much more detailed information on animal circadian rhythm (e.g., home cage behaviors like, eat, drink, sleep, walk, jump, rear up, hang up, groom, sniff, twitch, stretch, etc.). Acquiring measures of both activity and circadian rhythm at the same time, something that has become more important in behavior research.

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