title: Down the up staircase: evidence against negative geotactic responses in Rattus norvegicus.
mesh_terms: D000818:Animals; D006112:Gravitation; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D009949:Orientation / Q000502:physiology*; D051381:Rats / Q000502:physiology*; D013045:Species Specificity