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Figure 1 | Journal of Orthopaedic Surgery and Research

Figure 1

From: Evaluation of occipitocervical neutral position using lateral radiographs

Figure 1

Illustrations of the MCD, OCA, and OCD on one lateral radiograph. The MCD is the shortest distance (BD) from the midpoint (point B) of the two apices of the mandible angles (points A and C) to the curve of the anterior border from C2 to C3(a). The OCA is the intersection of McRae's line and a line drawn parallel to the superior endplate of C3(b). The OCD was the shortest distance from the superior aspect of the C2 spinous process to the occipital protuberance (c).

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