Behavior, Animal/drug effects; Brain Ischemia/drug therapy; Cognition Disorders/prevention & control; Cognition/drug effects; Eicosapentaenoic Acid/pharmacology; Neuroprotective Agents/pharmacology; Oxidative Stress/drug effects; Prosencephalon/drug effects; 8-Hydroxy-2'-Deoxyguanosine; Analysis of Variance; Animals; Anti-Inflammatory Agents/pharmacology; Antioxidants/pharmacology; Apoptosis/drug effects; Biomarkers/metabolism; Brain Ischemia/complications; Brain Ischemia/immunology; Brain Ischemia/metabolism; Brain Ischemia/pathology; Cognition Disorders/immunology; Cognition Disorders/metabolism; Cognition Disorders/pathology; DNA Damage; Deoxyguanosine/analogs & derivatives; Deoxyguanosine/metabolism; Disease Models, Animal; Gerbillinae; Inflammation Mediators/metabolism; Male; Maze Learning/drug effects; Neurons/drug effects; Neurons/metabolism; Neurons/pathology; Prosencephalon/immunology; Prosencephalon/metabolism; Prosencephalon/pathology; Reactive Oxygen Species/metabolism; Time Factors