“Systematic reviews of controlled clinical studies of treatments used by chiropractors have found no evidence that chiropractic manipulation is effective, with the possible exception of treatment for back pain.[8] A 2011 critical evaluation of 45 systematic reviews concluded that the data included in the study “fail[ed] to demonstrate convincingly that spinal manipulation is an effective intervention for any condition.”[10] Spinal manipulation may be cost-effective for sub-acute or chronic low back pain, but the results for acute low back pain were insufficient.[11] No compelling evidence exists to indicate that maintenance chiropractic care adequately prevents symptoms or diseases.[12]”
It seems to me that atlas orthogonal adjustment is more of a real thing offered than just getting your neck twisted, then again as someone who probably needs that (I had whiplash many years ago) I have no idea if the places near me have the equipment for it (or x-ray stuff needed) so that along with paperwork/scheduling has stopped me.