Fig. 3From: Impact of cervical sagittal parameters on axial neck pain in patients with cervical kyphosisRegional type I, at least 1 of the upper cervical centroids is anterior to and at least 1 of the lower cervical centroids is posterior to the C2–C7 centroid line; in addition, the distance between the C2–C7 centroid line and at least 1 centroid is ≥ 2 mmBack to article page