Inverse C7-T1
Defenition: Inverse C7-T1 is defined as equal or less mobility in motion segment C7-T1 compared with T1-2.
Clinical aspects of inverse C7-T1
The inverse C7-T1 dysfunction involves motion segments having a close relationship to the Stellate ganglion. Dysfunction in this this region relates to a variety of symptoms and conditions in the head, neck and arms. Research has shown a significant relationship to mental stress and our clinical experience has recognized a relationship to sympathetically mediated pain.
Permanent compensation pattern
Inverse C7-T1 is a predictor of neck-shoulder pain (NSP). It is more frequent among female subjects. Having a permanent inverse C7-T1 presents an elevated risk of NSP (RR 3.1, CI 95% 1.1-6.9) and yields a positive predictive value of 84%.