Antioxidants/therapeutic use; Bacopa/chemistry; Cognition Disorders/drug therapy; Neurodegenerative Diseases/drug therapy; Phytotherapy; Plant Extracts/therapeutic use; Streptozocin/toxicity; Animals; Antioxidants/isolation & purification; Catalase/analysis; Cognition Disorders/chemically induced; Disease Models, Animal; Drug Evaluation, Preclinical; Energy Metabolism/drug effects; Glutathione Peroxidase/analysis; Glutathione Transferase/analysis; Hippocampus/drug effects; Hippocampus/metabolism; Injections, Intraventricular; Lipid Peroxidation/drug effects; Male; Maze Learning/drug effects; Nerve Tissue Proteins/analysis; Neurodegenerative Diseases/chemically induced; Plant Extracts/isolation & purification; Rats; Rats, Wistar; Sodium-Potassium-Exchanging ATPase/analysis; Streptozocin/administration & dosage; Superoxide Dismutase/analysis; Thiobarbituric Acid Reactive Substances/analysis