This page is viewed best thru at the present time. Chiropractic OnLine Today presents part 1of a 2 part discussion on Congenital Malformations of the Cervical Spine , which is authored by Dr. David Lemberg, DC, FACO . Part I David Lemberg, DC, FACO Chiropractic Orthopedist 1.
Basilar impression is evaluated by several methods.
Chamberlain's line . This is a line drawn from the posterior edge of the hard palate to the posterior margin of the foramen magnum. If the tip of the odontoid is above this line, then basilar impression exists. Line drawn from the posterior edge of the hard palate to the most caudal point of occipital curve. A wide range of normality has been demonstrated with McGregor's line, making it less useful.