At least 5-8 times a year, I’ll get a patient in that tells me that they have seen a chiropractor for their upper neck pain (or another part of their spine) but it never resolved.
I smile and do the usual orthopedic and neurological testing along with muscle testing neck muscles like the cervical erector, the SCM & the Scalene Anticus.
And then I go and test muscles bilaterally such as the Psoas muscle a major muscle of locomotion or the Gluteus Maximus; both of these muscle being strong postural muscles
And sure enough one of these muscles will test weak bilaterally. I then ask the patient to place two fingers (or therapy localize) on two different segments (vertebrae) bilaterally and then re-test.
If the muscle being tested is strengthened, then I know that the problem is not a subluxation where one or two vertebrae are misaligned and fixed in that position but a fixation where two or three vertebrae are fixed on each other.
Adjusting each vertebrae individually does nothing until you adjust both vertebrae at the same time in order to break up the fixation.
Your local certified Applied Kinesiologist who is either a chiropractor or an osteopath has trained in this technique and can help you greatly.