One-To-Zero (OTZ) Health Education Systems trains licensed chiropractors in the OTZ Method’s “top-down analysis” which involves specific correction of the occipital-atlanto subluxation and then moves down sequentially through the spine. Emphasis is also placed on anterior cervical adjusting and also the difficult cervico-thoracic junction (C7-T4). In OTZ land we call the cervico-thoracic area “the vault” because it can be difficult to adjust. The occipital-atlanto subluxation pattern, known as the Hatcher-Murphy Subluxation, is explored in great detail. Resolution of this subluxation can have profound effects on brainstem nuclei, especially cranial nerve 11 which is involved in Frozen Shoulder Syndrome and cranial nerve 10 which, through the poly vagal response, can have profound effects on children with developmental delays. Chiropractic functional neurology is discussed during the seminars to explain how this method of analysis and treatment can affect conditions such as Frozen Shoulder Syndrome, Migraine Headache, Vertigo, Insomnia, Bell’s palsy, Autism, ADHD, posture, as well as others.