The carotid sinus reflex protects the blood supply to the brain, whereas the aortic reflex is more concerned with maintaining adequate blood pressure in the systemic circuit as a whole.

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The carotid sinus reflex is sensitive to changes in blood pressure in the carotid arteries near the base of the neck, and triggers a reflexive response to adjust blood flow to the brain. The aortic reflex operates similarly, but responds to changes in blood pressure in the aorta and throughout the systemic circulation. Both reflexes help maintain homeostasis in the cardiovascular system.

The Carotid Sinus Reflex Protects the Blood Supply to the Brain