![]() ![]() The structure of the cervical spine should be adequately visualized, and all seven cervical vertebrae need to be present (except with rare patients). ![]() To determine the appropriate S-line for each case, the doctor must first determine if the X-ray was taken properly (see Chapter 3, Figs. However, the atlas presents in the superior plane in the vast majority of cases, so this line is generally referred to as an S-line. An atlas Sagittal plane line projecting through the hard palette is considered an S0. These Atlas plane lines are divided into two categories: lines projecting above the hard palette are S (or superior), and lines below the hard palette are I (or inferior). The lateral cervical film must be analyzed to determine the superiority or inferiority of the atlas in the Sagittal plane relative to the skull. The biomechanics and clinical significance of the lateral cervical curve will also be reviewed in this chapter. This information is essential for determining the contact point for delivering the Adjustment. The Lateral cervical view will also allow the doctor to find the atlas transverse process in its relationship to the Mastoid process and ramus of the mandible. These points are critical in the analysis of the nasium because they will be used to construct the Atlas plane line. This slope is necessary to project the image of the atlas posterior arch so that the inferior attachment points are clearly visible on the nasium X-ray. The lateral radiograph also provides information about the Sagittal plane of the atlas vertebra, which is measured so that this angle can be used to determine the Central ray for the nasium film. This chapter will provide a brief overview of the steps involved with assessing the osseous integrity of the cervical spine. The lateral cervical X-ray provides the doctor with potential pathological and biomechanical information that will aid in the care of the patient. ![]()
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