Find me on Instagram: @TheTravelingHaloOfHope The only way I was able to move my R shoulder was by hyperflexing my neck. We now know I had to do this maneuver because the nerves that serve my shoulder were being compressed. During one test I had, it showed with my neck in a neutral position I had 50% function to my deltoid muscle, and when my neck was hyperflexed I had 100% funcion.