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Year : 2021  |  Volume : 70  |  Issue : 3  |  Page : 151-155

Variation of the superior articular facet of atlas and their significance

Department of Anatomy, Christian Medical College, Ludhiana, Punjab, India

Correspondence Address:
Dr. Neeru Goyal
Department of Anatomy, Christian Medical College, Ludhiana, Punjab
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JASI.JASI_125_19

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Introduction: Atlas helps in complex biomechanical movements of the skull along with weight transmission of skull to spine. Recent developments in fixation technologies and minimally invasive surgical approaches have encouraged further studies of the region. Objectives of this study are to explore the shape, size, and symmetry of the superior articular facet of atlas. Good knowledge of the variations of the facet is important for orthopedicians, physiotherapists, and neurosurgeons. Material and Methods: The study was conducted on 110 dried adult atlas vertebrae. Shape, size, and number of the superior articular facets on each atlas were recorded. Results: Different shapes observed were kidney-shaped, oval-shaped, irregular, rectangular, comma-shaped, sinuous, sole/8-shaped, and two/three separate facets. Length and width of the facet were similar on two sides. In 31.82% of cases, the facets on the two sides were not symmetrical. Discussion and Conclusion: Variations of the superior articular facets have been extensively described. While planning treatment plans in cases of craniovertebral joint dysfunction, morphology and variations of the region should be kept in mind.

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