Intestines: Regulates absorption and the movement of food. The nerve interacts closely with the hypothalamus and limbic system, suggesting that gut health, mediated by vagal signaling, can have a profound impact on mental health and cognitive function.
Vagus Nerve Reflex Actions in the Respiratory and Digestive Systems
It stimulates the production of stomach acid and digestive enzymes, while also regulating the rhythm of intestinal contractions, known as peristalsis. This action ensures that the airways remain clear but not overly reactive.
Irritation of the vagus nerve can trigger a reflexive cough, serving as a protective mechanism for the lungs. Cardiac Regulation and Variability The activity of the vagus nerve is a key determinant of heart rate variability (HRV), a marker of physiological resilience.
Vagus Nerve Reflex Actions in Respiratory and Digestive Systems
Specifically, it sends parasympathetic fibers to the sinoatrial (SA) node and the atrioventricular (AV) node. Respiratory System Influence The vagus nerve also plays a significant role in pulmonary function.
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