Pennsylvania State University researchers link abdominal muscles to cerebral blood flow

Researchers at Pennsylvania State University have discovered a direct connection between abdominal muscle contraction and the regulation of cerebral blood flow. The study, published in the Proceedings of the National Academy of Sciences, utilized mouse models to demonstrate that everyday movements—such as walking, exercising, or coughing—can trigger rapid changes in brain circulation.

When abdominal muscles contract, they increase pressure in blood vessels connected to the brain via the spinal canal. This pressure change causes an ultra-fast constriction of major veins within the skull, specifically affecting structures like the superior sagittal sinus and bridging veins. This process results in a momentary increase in cerebral blood flow.

Lead author Qingguang Zhang noted that the reaction occurs in approximately one-tenth of a second, which is significantly faster than the response typically seen in arteries. The findings suggest that cerebral veins are not merely passive conduits but play an active role in blood flow regulation. While the study was conducted on mice, researchers believe the physiological structures are similar enough to humans to suggest a comparable mechanism in people.