Adverse Events After Cervical Spinal Manipulation - A Systematic Review and Meta-Analysis of Randomized Clinical Trials.

Background: Cervical manipulations are widely used by physiotherapists, chiropractors, osteopaths, and medical doctors for musculoskeletal dysfunctions like neck pain and cervicogenic headache. The use of cervical manipulation remains controversial, since it is often considered to pose a risk for not only benign adverse events (AEs), such as aggravation of pain or muscle soreness, but also severe AEs such as strokes in the vertebrobasilar or carotid artery following dissections. Studies finding an association between cervical manipulation and serious AEs such as artery dissections are mainly case control studies or case reports.