The sign of shoulder girdle freedom is an important sign of a posterior atlantoaxial joint instability. It was initially observed by the American surgeon Kinnard (Kinghard) in 1883, then it was systematically studied by A.Ya. Kozhevnikov (1959), G.A. Ivanitsky (1969) and other domestic specialists.
Symptoms of flaccid shoulder girdles (loose anterior shoulder girdles) suggest laterodilation of the spine in the cervical region, and their absence makes diagnosis difficult. It should be emphasized that in some patients with posterior stable subluxations