Open fields (unlike wheels) can be any shape but still miss the target.
Stanford
S Clare
SC
Department of Pharmacology, University College London, London, UK. c.stanford@ucl.ac.uk
D000818:Animals; D001522:Behavior, Animal; D019411:Clinical Laboratory Techniques / Q000941:ethics / Q000592:standards*; D051379:Mice; D023421:Models, Animal; D009043:Motor Activity / Q000187:drug effects*; D010600:Pharmacology / Q000379:methods; D015203:Reproducibility of Results; D012107:Research Design / Q000592:standards*