The cervical region, which has a more mobile structure than other parts of the spine, is examined in 2 parts as the upper and lower cervical regions. The upper cervical region has different anatomical and biomechanical features than the lower cervical region. The ligament system of the upper cervical region, which undertakes most of the mobility of the head under favour of the joint and ligament system specialized compared to other spinal parts, also contributes significantly to the stability of the cervical region. Studies have shown that any damage that may occur in these joint and ligament systems can cause instability.