Chiropractic & Osteopathy
Manipulation That Helps Backs, and the Theory That Overreached
Evidence grade 2 of 5, Thin. Read how the Atlas grades evidence.
The evidence splits cleanly along the line between musculoskeletal use and the founding theory. For low back pain, and to a lesser extent neck pain and some headaches, spinal manipulation has reasonable supporting evidence and is included in many mainstream guidelines as an option; a meta-analysis of osteopathic manipulative treatment found it significantly reduced low back pain, and manipulation is broadly considered "likely to be beneficial" for back pain. Beyond musculoskeletal problems, the picture collapses: with the possible exception of back pain, chiropractic manipulation has not been shown to be effective for any medical condition, and the subluxation theory underlying claims to treat asthma, ear infections, colic, or other systemic disease is not supported by evidence. So: a genuinely useful manual therapy for back and neck pain (especially as practiced by evidence-based chiropractors, osteopaths, and physiotherapists), wrapped, in part of the field, in an obsolete vitalist theory that overreaches into claims it cannot support.
Reference only. Not medical advice.
What can go wrong
For low back manipulation, serious harm is rare and mild transient soreness, stiffness, or headache is common, reported in roughly 50-67% of patients in large case series. The serious safety concern is cervical (neck) manipulation and stroke. High-velocity neck adjustments have been associated in case reports and case-control studies with vertebral artery dissection leading to stroke, occasionally fatal. In 2014 the American Heart Association and American Stroke Association issued a scientific statement concluding that although current biomechanical evidence is insufficient to establish that cervical manipulation causes dissection, an epidemiologic association exists and patients should be informed of it before undergoing neck manipulation. A large case-control study (Cassidy 2008) found similar stroke risk after chiropractic and primary-care visits and argued the link may reflect reverse causation, people with an early undiagnosed dissection seeking care for neck pain and headache before the stroke. The true incidence is uncertain and debated; the prudent reading is a small but real potential risk to weigh against gentler options. Other risks include rare fracture or nerve injury, and harm from subluxation-based practitioners who discourage vaccination or conventional care or who treat children for non-musculoskeletal conditions. Anyone considering neck manipulation, and anyone with pregnancy, pediatric, neurological, or bone-density concerns, should consult a qualified medical provider first and choose an evidence-based practitioner who reserves manipulation for musculoskeletal pain.
Osteopathy (A.T. Still, 1874) and chiropractic (D.D. Palmer, 1895) are American manual-medicine systems built on manipulating the spine to restore health. Chiropractic's founding idea, that undetectable vertebral "subluxations" block a vital nerve force and cause disease, is not supported by anatomy or evidence, and the UK regulator has called it a historical concept with no clinical research behind it. The clinical evidence splits cleanly. Spinal and osteopathic manipulation has modest, guideline-recognized support for acute and chronic low back pain, on par with other active care, with some signal for neck pain and cervicogenic headache; a JAMA meta-analysis found small short-term pain and function gains. Beyond musculoskeletal complaints, chiropractic manipulation has not been shown to treat any condition, and subluxation-based claims for asthma, colic, or ear infections are unsupported. Back manipulation is usually low-risk, with mild soreness common. The serious safety question is cervical (neck) manipulation and rare stroke from vertebral artery dissection, which the American Heart Association addressed in a 2014 statement.
Spinal manipulation genuinely helps some back and neck pain, but the founding "subluxation"/vital-force theory and claims to treat other diseases are not supported, and neck adjustments carry a small, debated stroke risk.
What people take it for
These are the reasons people give for taking it. They are not effects it has been shown to have.
How it is supposed to work
The validated mechanism is mechanical and neurological: spinal manipulation and mobilization can reduce musculoskeletal pain through effects on joints, muscles, and pain signaling, much like other manual physiotherapy, which is why it helps some back and neck pain. The founding theories, the chiropractic "vertebral subluxation" blocking a vital force, and vitalist readings of osteopathy, are not supported by anatomy or physiology; there is no evidence that undetectable spinal "subluxations" cause systemic disease or that adjusting them treats non-musculoskeletal conditions. The honest mechanism is manual therapy for musculoskeletal pain, not correction of a disease-causing energy blockage.
What people get wrong
Often saidChiropractic adjustments correct subluxations that cause disease throughout the body.
ActuallyThe UK General Chiropractic Council stated in 2010 that the chiropractic vertebral subluxation complex is a historical concept not supported by any clinical research evidence for claims that it causes disease or health concerns. Reviews find evidence negative or too weak for non-musculoskeletal conditions such as asthma, colic, ADHD, dizziness, and high blood pressure. Manipulation helps some back and neck pain mechanically; the disease-causing-subluxation theory is not.
Often saidSpinal manipulation is either completely safe or extremely dangerous.
ActuallyNeither. For low back pain, serious harm is rare and mild transient soreness is common, reported in roughly 50-67% of patients in large case series (Paige, JAMA 2017). Cervical (neck) manipulation carries a small, genuinely debated risk of stroke from vertebral artery dissection (AHA/ASA, Stroke 2014). The prudent course is evidence-based use for musculoskeletal pain and caution with neck adjustments.
Often saidChiropractors and osteopaths are the same thing.
ActuallyThey diverged. US osteopathy became full osteopathic medicine, and DOs are licensed physicians in all 50 states who can prescribe and perform surgery (AACOM). Chiropractic remained a distinct manual-therapy profession, internally split between subluxation-based and evidence-based practice.
Often saidA chiropractor can treat conditions like ear infections or high blood pressure.
ActuallyThere is no good evidence that spinal manipulation treats non-musculoskeletal conditions. A 2010 systematic review concluded there is no good evidence that neck manipulation is an effective treatment for any medical condition beyond the musculoskeletal domain.
Who profits, and who pushes back
Back-pain guidelines & OMT trials
Support spinal manipulation as an option for low back pain (with a meta-analysis showing significant reduction), and for some neck pain and headache.
Evidence-based chiropractors & DOs
Practice manipulation as evidence-based manual therapy for musculoskeletal pain, distancing themselves from subluxation theory and broad disease claims.
Critics of subluxation theory
Reject the chiropractic subluxation and vital-force theory as unsupported, noting manipulation has not been shown effective beyond, possibly, back pain.
Neurology & safety researchers
Document case reports of stroke from artery dissection after neck manipulation, while a large case-control study found no significant association, leaving incidence uncertain and debated.
Where the research comes from
Most of the published research on this comes from one place. 85% of it is from United States. Findings that no unrelated group has reproduced are weaker than the study count makes them look.
| Place | Share of published research |
|---|---|
| United States | 85% |
| Europe, Australia, Canada | 75% |
| Global | 62% |
How we got here
Both systems began in the American Midwest. Andrew Taylor Still, a Kansas physician, introduced osteopathy in 1874 and opened the American School of Osteopathy in Kirksville, Missouri, in 1892, teaching that manipulation could restore the body's structure and self-healing. Daniel David Palmer, a magnetic healer in Davenport, Iowa, performed what he called the first chiropractic adjustment in 1895 on a partially deaf janitor, Harvey Lillard, and soon after added a chiropractic school to his infirmary. Palmer framed disease as the result of vertebral "subluxations" interfering with an innate vital force. Across the 20th century US osteopathy professionalized into full osteopathic medicine, and holders of the DO degree are now licensed physicians in all 50 states. Chiropractic stayed distinct and internally divided between "straights" loyal to subluxation theory and "mixers" who lean on evidence-based musculoskeletal care. As controlled trials accumulated, the field converged on manipulation as a reasonable option for back pain, while regulators distanced themselves from subluxation claims.
- 1874A.T. Still introduces osteopathy in the American Midwest
- 1892Still opens the American School of Osteopathy, Kirksville, Missouri
- 1895D.D. Palmer performs the first chiropractic adjustment (Harvey Lillard), Davenport, Iowa
- 1897Palmer School of Chiropractic established; subluxation theory taught
- 2001With Louisiana's acceptance of COMLEX-USA, DOs can be licensed in all 50 states
- 2008Cassidy et al. case-control study reframes chiropractic-stroke link as possible reverse causation
- 2010UK General Chiropractic Council states subluxation is a historical concept unsupported by clinical evidence
- 2014AHA/ASA scientific statement (Stroke) on cervical manipulation and arterial dissection
- 2017JAMA meta-analysis: SMT gives modest short-term benefit for acute low back pain
How it is understood
Chiropractic and osteopathy are two American manual-medicine systems born in the late 19th century, both founded on the idea that manipulating the body, especially the spine, restores health. Chiropractic, founded by D.D. Palmer in 1895, taught that misalignments of the vertebrae ("vertebral subluxations") interfere with the flow of a vital force ("Innate Intelligence") and cause disease, and that "adjusting" the spine cures it. Osteopathy, founded earlier by A.T. Still (1874), held that the body's structure and function are interrelated and that manipulation supports the body's self-healing. The two diverged sharply over time: in the United States, osteopathy evolved into fully licensed osteopathic medicine (DOs are physicians with the same scope as MDs, who may add osteopathic manipulative treatment, OMT), while chiropractic remained a distinct profession centered on spinal manipulation, itself split between "straights" who still hold to subluxation theory and "mixers" open to evidence-based practice. Both are now among the most widely used manual therapies in the world, mostly for back and neck pain.
At a glance
- Chiropractic founder
- D.D. Palmer (1895), "subluxation"
- Osteopathy founder
- A.T. Still (1874)
- Validated for
- Low back pain, some neck pain/headache
- Key risk
- Cervical manipulation & stroke (debated)
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about Chiropractic & Osteopathy. A short entry is not a safe entry.
- Cost and market. We have not documented what it sells for or who sells it.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- How it compares. We have not set it against the alternatives.
- Children and teenagers. We have not checked what is known about younger people.
Sources
SMT for acute low back pain: 15 RCTs / 1,699 patients, modest short-term pain and function gains, minor transient adverse events in 50-67% of case series
Osteopathic manipulative treatment significantly reduced nonspecific low-back pain (effect size -0.30, 95% CI -0.47 to -0.13)
SMT gives small, not-clinically-relevant benefit over other treatments and no advantage over sham for chronic low back pain
Cochrane (Rubinstein SM et al.), spinal manipulative therapy for chronic low-back pain
AHA/ASA: epidemiologic association between cervical manipulation and cervical arterial dissection; biomechanical causation not established; inform patients before neck manipulation
Biller J et al., Stroke 2014;45:3155-3174 (AHA/ASA scientific statement)
Population case-control/case-crossover: similar VBA-stroke risk after chiropractic and primary-care visits, interpreted as reverse causation (protopathic bias)
UK General Chiropractic Council states subluxation is a historical concept unsupported by clinical research evidence for disease claims
General Chiropractic Council 2010 guidance, via Vertebral subluxation (Wikipedia, sourced)
Evidence negative or too weak for chiropractic in non-musculoskeletal conditions; mainstream view of subluxation as pseudoscientific
A.T. Still introduced osteopathy in 1874 and opened the American School of Osteopathy in Kirksville, Missouri, in 1892
DOs are licensed physicians in all 50 states; single MD/DO GME accreditation since 2020; 150 years of osteopathic medicine dated to 1874
American Association of Colleges of Osteopathic Medicine (AACOM)
D.D. Palmer performed the first chiropractic adjustment on Harvey Lillard in 1895 in Davenport, Iowa; Palmer School founded soon after
No good evidence that neck manipulation is an effective treatment for any medical condition; risks argued to outweigh benefits
Ernst E, adverse effects / effectiveness reviews (JRSM 2007; 2010 review)