Figure 1From: Comparisons of three anterior cervical surgeries in treating cervical spondylotic myelopathy Hyperextension and hyperflexion radiograms of postoperative DCI and CTDR. a, b angle α plus angle β is ROM of C2–7, angle α1 plus angle β1 is ROM of operative level. c, d angle α plus angle α1 is ROM of upper level, angle β plus angle β1 is ROM of lower level.Back to article page