Palmer hypothesized that vertebral joint misalignments, which he termed vertebral subluxations, interfered with the body's function and its inborn ability to heal itself.[5] D. D. Palmer repudiated his earlier theory that vertebral subluxations caused pinched nerves in the intervertebral spaces in favor of subluxations causing altered nerve vibration, either too tense or too slack, affecting the tone (health) of the end organ.[41] D. D. Palmer, using a vitalistic approach, imbued the term subluxation with a metaphysical and philosophical meaning.[41] He qualified this by noting that knowledge of innate intelligence was not essential to the competent practice of chiropractic.[41] This concept was later expanded upon by his son, B. J. Palmer, and was instrumental in providing the legal basis of differentiating chiropractic from conventional medicine. In 1910, D. D. Palmer theorized that the nervous system controlled health:
Paige, N. M., Miake-Lye, I. M., Booth, M. S., Beroes, J. M., Mardian, A. S., Dougherty, P., ... Shekelle, P. G. (2017, April 11). Association of spinal manipulative therapy with clinical benefit and harm for acute low back pain: Systematic review and meta-analysis. Jama, 317(14), 1451–1460. Retrieved from https://jamanetwork.com/journals/jama/fullarticle/2616395
A small study of just 7 patients with pain as the only symptom of spontaneous cervical artery dissection. There was disconcerting variety in presentation, but the pain was consistently severe, unfamiliar, unilateral, and mostly sudden onset. “Cervicocephalic arterial dissection should be suspected when patients complain of intense unilateral posterior cervical and occipital pain or temporal pain.”
Attached to the back of each vertebral body is an arch of bone that forms a continuous hollow longitudinal space, which runs the whole length of the back. This space, called the spinal canal, is the area through which the spinal cord and nerve bundles pass. The spinal cord is bathed in cerebrospinal fluid (CSF) and surrounded by three protective layers called the meninges (dura, arachnoid and pia mater).

Most people believe that chiropractors treat back pain. That is a true, but there is so much more that chiropractic care can achieve. Because chiropractors help to remove pressure from the nervous system, they can also influence many other conditions. It is common to hear chiropractic patients say that they came in for back pain and their headaches got better.
The treatment plan may involve one or more manual adjustments in which the doctor manipulates the joints, using a controlled, sudden force to improve range and quality of motion. Many chiropractors also incorporate nutritional counseling and exercise/rehabilitation into the treatment plan. The goals of chiropractic care include the restoration of function and prevention of injury in addition to back pain relief.
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