The Vagus Nerve is our 10th Cranial Nerve, the longest nerve in the body, connects all of our organs and is the key to getting us into Parasympathetic Nervous System. If the Vagus Nerve is stimulated and healthy, we will go into PSNS easily. If its shut down, constricted or weak, we will tend to be in SNS/survival.
The Vagus Nerve travels all throught the horse, and there are a few key places we can easily stimulate it. Equine Tapping is used to stimulate the Vagus Nerve and trigger the PSNS/rest/digest/play/learn/heal.