INTRODUCTION AND RATIONALE Physiological motion of the cervical spine is a subject of interest for medical specialists. Although the term 'physiological motion' is commonly used, a proper definition has been lacking for a long time. Segmental range of motion (sROM, e.g. the amount of sagittal
Every subject will have a pre-screening interview by phone or other methods to find if the subject may meet the inclusion/exclusion criteria. After a Screening Period, a subject with the Kellgren-Lawrence Radiographic Grade 1, 2, and 3 will be randomly assigned to 1 of 2 treatment groups in a 2:1