Cognitive Function Dementia Traumatic Brain Injury Microplastics in the Brain Trauma Injuries Neurotrophic Factors Medical Emergencies Stroke Surgical Interventions Hemorrhage Tumors Hippocampus Dietary Influences Microplastics Toxicology Microplastics Impact Myelin Integrity Sleep and Cognitive Function Preservation of Brain Tissues Effects of Chemicals on Brain Oligodendrocytes Chemicals Chemical Exposure Research Cognitive Disorders Motor Impairments Toxic Substances Chronic Traumatic Encephalopathy Blood Flow Disorders Concussion