June 15, 2020
The Vagal Nerve is the longest cranial nerve controlling a human’s inner nerve center, the parasympathetic nervous system. It oversees a vast range of vital functions communicating sensory input from outside triggers to the rest of the body.
Polyvagal theory emphasizes the evolutionary development of two systems: the parasympathetic nervous system which is ultimately connected to the vagal nerve and the sympathetic nervous system. Each has its own function, and cause the body to react differently before, during, and after a traumatic or stressful event. If these two systems become damaged from excessive and recurrent trauma, a break down occurs and mental illnesses such as CPTSD and anxiety disorders may result.
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