The term referring to redistribution of blood from separate brain arteries to other areas is which?

• A. Anastomoses
• B. Bilateral Circulation
• C. Prosthesis
• D. Collateral Circulation

Answer: (D)

The main concept here is collateral circulation in the brain—the network of alternative vascular pathways that can carry blood to areas when the usual arteries are blocked or underperfused. When a primary artery is compromised, blood can be redirected through existing connections and, if needed, newly formed vessels to keep brain tissue perfused and minimize damage. The term describes this redistribution of blood flow.

Anastomoses are the actual connections between vessels that allow these routes, but the overall process of rerouting blood to supply at-risk areas is best labeled collateral circulation. Bilateral circulation would refer to blood supply from both sides rather than rerouting due to blockage, and a prosthesis is an artificial device unrelated to natural blood flow rerouting.