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"Spinal manipulative therapy is a frequently applied therapy for back and neck pain. Carotid and vertebral artery trauma, cerebellar and brainstem stroke, fracture of odontoid process, and atlantoaxial dislocation due to chiropractic manipulation have been reported in the literature. We report an occurrence of quadriparesis after chiropractic manipulation...We believe that the manipulation in this patient led to the para central C6-C7 disc protrusion and subsequent quadriparesis due to temporal association with the maneuver, clinical plausibility, and lack of alternate explanation. Although the absolute risk due to neck manipulation is small, the risk-to-benefit ratio of manipulation for neck pain and prolapsed disc is unacceptably high." American Journal of Medicine (November 2009) [FULL TEXT]