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Illustration of descriptive statistcs for Chamberlain's line violation, Boogard's angle, Clivus canal angle, cervical lordosis angles (Lordosis) and Welcher's angle (Welcher). In the x-axis, 1, 2, 3, and 4 is referred to control group, Chiari malformation, Basilar Invagination type 1 and Basilar invagination type 2 groups, respectively. Note that as the as the CLV increases, Boogard's values increase and Clivus canal and Cervical lordosis angle decrease
