Question

*Chamberlain's line*

1) landmarks

2) If the odontoid is greater than 7 mm above the line this indicates _____

Answer 1

Chamberlain's line is a radiological landmark drawn from the hard palate to the foramen magnum. If the odontoid process is more than 7 mm above this line, it may indicate basilar invagination.

Step-by-step explanation:

The Chamberlain's line is a significant landmark in radiological examinations of the cervical spine. It's a line drawn from the dorsal margin of the hard palate to the dorsal edge of the foramen magnum. This line is used clinically to assess the position of the odontoid process which is the upward projection from the second cervical vertebra (C2).

If the odontoid process extends more than 7 mm above the Chamberlain's line this could indicate the presence of a pathological condition such as basilar invagination. Basilar invagination is a condition where there is an abnormal superior displacement of the odontoid process into the foramen magnum which can impinge upon the brainstem or spinal cord.