|Brain blood flow is the blood supply by network of blood nerves to the brain. It is also known as cerebral blood flow (CBF). Arteries supplies oxygenated blood, nutrients and glucose to brain whereas veins remove lactic acid, metabolic products and carbon dioxide by carrying deoxygenated blood back to the heart. Peer review refers to the work done during the screening of submitted manuscripts and funding applications. This process encourages authors to meet the accepted standards of their discipline and reduces the dissemination of irrelevant findings, unwarranted claims, unacceptable interpretations, and personal views. Publications that have not undergone peer review are likely to be regarded with suspicion by academic scholars and professionals.