Many people suffering neck and back pain turn to chiropractors for help. Often, during this treatment, the chiropractor will perform a neck manipulation whereby the patient lies on her back, the chiropractor will pull on the patient’s neck, extending the vertebrae in the neck and then will move the neck from side to side, creating a “cracking” sensation. During this neck rotation, the veterbral artery in the neck can tear. When this occurs, the tearing will cause bleeding and clotting within the artery. The subsequent clot that develops can cause a stroke. This information from WebMd explains the process more:
One of the leading causes of stroke before age 45 is something called cervical arterial dissection. That’s when one of the two arteries that wind through the back of the neck to the brain starts to tear. The lining of the artery bleeds and forms a blood clot. This clot can easily enter the brain and cause a fatal stroke.
Earlier studies in Canada compared stroke registries with medical records. Strokes in younger adults were strongly associated with seeing a chiropractor. Was there a real cause-and-effect connection? Smith looked for more evidence.
His team looked at all patients under the age of 60 who from 1995-2000 visited two large medical centers for cervical dissections resulting in strokes or the passing stroke-like episodes called transient ischemic attacks. They found 151 such patients; 51 were available for study. The patients were compared with 100 age-matched patients whose strokes were not due to arterial dissection. All were asked a battery of questions — including whether they had head or neck pain in the 30 days before their stroke, and whether they got a spinal manipulation during that time.
Of the 51 patients, seven (14%) remembered getting their necks cracked before their stroke. Only 3% of the control patients remembered seeing a chiropractor in the month before their stroke. After controlling for all other factors, getting a spinal adjustment upped the risk of stroke 6.62-fold.
“If a person has any of the symptoms of stroke, he or she should bypass the chiropractor and go directly to the hospital,” Smith says.
These red flags are:
- One side of the body becomes weak, numb, or paralyzed.
- Double vision, blurry vision, or loss of sight.
- Trouble speaking or difficulty understanding speech.
- Loss of balance or coordination; dizziness.
- Sudden severe headache.
“Neck cracking,” or cervical spinal manipulation, is the chiropractic technique that most concerns neurologists. To make this adjustment, the practitioner often gives the neck a high velocity twist. Chiropractors are trained to know the anatomy of the neck. Other kinds of practitioners, Smith says, may not be so well aware of the risks. He notes that many chiropractors already are adopting a less forceful technique for cracking necks.
This video, provided from our friends at Abelson Law shows exactly how the stroke occurs:
This occurrence is common in young adults. If you or a loved one has recently had a chiropractic manipulation and then suffered a stroke shortly thereafter, call the Manchin Injury Law Group at 304-367-1862 today for a free consultation.