The ear can be viewed like a computer keyboard terminal, with peripheral access to the hard drive, the brain. Losing or damaging the ear would not necessarily be destructive to the brain computer any more than losing a keyboard would be damaging a physical computer. However, by having this peripheral processor on the ear, there is more ready access to the central brain computer than is normally available.
Dr. Eustice utilizes Auriculotherapy to alleviate allergies, pain syndromes, addictions (including cigarettes) and compulsive disorders, and many other ailments.
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Cancer Treatment Centers of America video on Auriculotherapy