C-0, C-1, & C-2 instability can contribute to concussion symptoms and in some cases mimics concussion symptoms but many concussion symptoms are entirely neurological. Treat C-0, C-1, & C-2 and headaches, some blood flow and maybe some vestibular issues may be relieved but most cognitive issues are due to stress to brain tissue. Upper cervical issues are not a quick fix. It often takes months of treatment and postural discipline. For some, upper cervical osteoarthritis becomes a life-long struggle.