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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: Predictive ability of pharyngeal inlet angle for the occurrence of postoperative dysphagia after occipitocervical fusion

Fig. 1

Representation of radiographic measurements. a O-C2a is the angle between McGregor’s line and the inferior endplate of the axis. O-EAa is the angle formed by McGregor’s line and the line connecting the midpoint of the bilateral external acoustic meatus and the midpoint of the inferior end plate of C2 (EA line). C2Ta is the angle formed by the inferior endplate of the C2 and EA lines. nPAS is the narrowest anterior-posterior diameter of the oropharynx between the tips of the uvula and epiglottis. b ADI is the distance between the back edge of the anterior arch of the atlas and the front edge of the odontoid process. C2-7a is the angle between the inferior endplate of C2 and C7. PIA is the angle between McGregor’s line and the line that links the center of the C1 anterior arch and the apex of cervical sagittal curvature

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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