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(A) Setting of the experimental apparatus. Seen from above: P: Paper towel; E: ethanol rinse bottle; TC: transporting cage; Cam: camera, OF: open-field apparatus. Dashed, blue lines represent the visual field of the cameras. (B) Seen from aside: (1) Label for the apparatus; (2) bedding material; (3) Flat upper grid; (4) Heavy object aimed to hold de grid in place.
