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Figure 6: The following figures shows sagittal sections through various congenital cranio-vertebral junction anomalies with vertical facet joints to demonstrate the “pseudo joints”. T= true joint, P= pseudo joint. Figures a and b illustrate the mechanism of formation of a pseudo-joint, when the facet joint becomes vertical. Figures c-f show the CT images of true vs pseudo joints in various patients with vertical occipito-C1 and C2 facet joints

Figure 6: The following figures shows sagittal sections through various congenital cranio-vertebral junction anomalies with vertical facet joints to demonstrate the “pseudo joints”. T= true joint, P= pseudo joint. Figures a and b illustrate the mechanism of formation of a pseudo-joint, when the facet joint becomes vertical. Figures c-f show the CT images of true vs pseudo joints in various patients with vertical occipito-C1 and C2 facet joints