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A new study has found a small but powerful brain region that could play a major role in raising high blood pressure.
About 1.3 billion people worldwide live with hypertension, and for about 40% of them, standard treatments never seem to work at all. (Image credit: Canva)
Most days I have wondered why, despite eating well, exercising, and taking prescribed medications, my mother's blood pressure still refuses to stabilize. If this sounds familiar, you're not alone. Millions of people live with persistent hypertension that simply does not respond as it should. What this really means is that the cause may not be where we have traditionally looked.
About 1.3 billion people worldwide live with hypertension, and for about 40% of them, standard treatments never seem to work at all. But what if the real culprit isn't just in our arteries or our diet, but in a hidden control center in the brain that regulates the way we breathe?
A new study published in Circulation Research is changing that thinking in a surprising way. Researchers from the University of São Paulo and the University of Auckland have discovered a small but powerful region of the brain, known as the lateral parafacial area (pFL), that could play an important role in raising blood pressure.
This part of the brain stem is often responsible for controlling forced breathing, such as when you cough, laugh, or exercise. On the one hand, that seems unrelated to blood pressure. On the other hand, the study shows that these same neurons can influence the body's stress response system, known as the sympathetic nervous system. When this system becomes overactive, blood vessels constrict and blood pressure increases.
In people with hypertension, the researchers found that the pFL region becomes unusually active. Instead of simply regulating breathing, it begins to overstimulate the body's “fight or flight” signals. This creates a persistent state in which blood vessels remain tight, keeping blood pressure elevated.
Up to 50% of hypertension cases have a strong neurogenic (nerve-related) component, often related to breathing patterns, sleep apnea, or blood gas fluctuations. The discovery explains why so many patients struggle with “resistant” hypertension.
The findings are particularly significant because they support the idea of neurogenic hypertension, where the brain and nervous system are key drivers of the condition. Estimates suggest that up to half of all cases of hypertension may have this neurological component. This helps explain why standard treatments, which focus primarily on the heart and blood vessels, don't work for everyone.
A new way to treat high blood pressure
By targeting the carotid bodies with drugs, researchers believe they can indirectly calm overactive brain signals. Early results suggest that this approach could act as a remote blood pressure monitor, lowering it safely and effectively.
This is important because hypertension remains a leading cause of heart attacks, strokes, kidney disease, and even cognitive decline worldwide. Approximately one in three adults lives with high blood pressure and a significant proportion battle treatment-resistant forms.
April 11, 2026, 1:01 PM IST
