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. 2023 Nov 22;24(23):16628. doi: 10.3390/ijms242316628

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The figure shows three open field cages (A, B, & C) with three different levels of panels (marked in black). Each cage is 40 cm in length, 40 cm in width, and 30 cm in height. Each panel has 16 infra-red beams; on the opposite side, there are their 16 sensors that count the interrupted beams caused by animal movements. The panels are located 4, 8, and 12 cm above the floor of the cage. The lower panels record the number of movements (NM) and the total distance (TD) in centimeters. The second level of panels with sensors records the number of stereotypic movement (NOS), and the third level records the vertical activity (VA) before and after drug exposure.