Abstract: The tail suspension test apparatus for detecting a struggling state of an animal by suspending a tail of the animal includes an optical mouse, an opaque piece located within a sensing range of the optical mouse, and a fixing device connected with the opaque piece for fixing the tail of the animal. When the animal is struggling, an action of the opaque piece is induced and detected by the optical mouse.

Abstract: An animal restraining apparatus and animal restraining procedure for using the same are provided. The experiment begins by preparing a live experiment animal, such as a mouse or rat coupled to a femoral vein/artery catheter via surgery. The experiment animal in a conscious state is then placed in a restraining apparatus. The restraining apparatus comprises a plurality of partitioning boards to partition the restraining space, such that the animal is restrained in the restraining space to prevent interference and infection from other animal, a supporting structure to carry the experiment animal, a rack for food and water, a signal receiver base, and a tail-fixing component fitted below or above the supporting structure.