The Vascular Autonomic Signal (VAS) is a physiological response of the neurovascular system of the body to information being brought into its energy field. This response is palpated on the wall of the radial artery. The discovery of the VAS by Dr. Paul Nogier in 1966 brought an energetic diagnostic tool to the world. Muriel Agnes, founder of the Canadian Institute of Auricular Medicine (CIAM), studied the VAS to explore mechanisms for understanding the VAS.
The studies include a clinical demonstration to show the effectiveness of using VAS palpation as a guide for directing acupuncture needles to points for the relief of chronic pain. In the clinical trial, a single treatment of VAS-directed auricular acupuncture resulted in immediate pain reduction in 85% of the cases, with an average pain reduction of all participants of 2.7 points on a 0 to 10 visual analogue scale. As well, an 84% consistency rate between two separate mappings of the dominant points indicated by the VAS to be the most important points for treatment. View the complete dissertation here.
For further introduction to the VAS, Dr. med. Frank Bahr discusses the use of VAS palpation as a supplemental tool to support body acupuncturists. See video:
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