Dvorak, J Functional evaluation of the spinal cord by magnetic resonance imaging in patients with rheumatoid arthritis and instability of upper cervical spine. [electronic resource] - Spine Oct 1989 - 1057-64 p. digital Publication Type: Journal Article ISSN: 0362-2436 Standard No.: 10.1097/00007632-198910000-00006 doi Subjects--Topical Terms: AdultAgedArthritis, Rheumatoid--complicationsAtlanto-Axial Joint--injuriesFemaleHumansJoint Instability--etiologyMagnetic Resonance ImagingMaleMiddle AgedNeurologic ExaminationSpinal Cord--pathologySpinal Cord Compression--diagnosisSpinal Stenosis--diagnosis