Neurocircuitry of a Novel Gastrointestinal-Circulatory Reflex

Abstract

The gastrointestinal tract receives about one third of the blood pumped around the body by the heart. This implies that the gut circulation plays a major role in blood pressure control. Gut blood flow changes according to the demands imposed by altered behavioural activity. Engagement in physical exercise results in increased blood flow to the working muscles of the limbs and diversion away from the gut. Alternatively, food consumption promotes an increase in blood flow to the gut to aid digestion. While this is a normal bodily process, there are also adverse implications of the re-distribution of blood flow: in the elderly compensation for these changes is often impaired and can result in l..

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