title: Genetic learning deficiency does not hinder environment-dependent brain growth.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000502:physiology*; D001921:Brain / Q000254:growth & development*; D005106:Exploratory Behavior / Q000502:physiology; D008297:Male; D009929:Organ Size; D051381:Rats; D012641:Selection, Genetic; D012931:Social Environment; D012934:Social Isolation