AI Article Synopsis
- The study aimed to analyze the asymmetrical features of the adult atlas, a cervical spine bone, using 3D computer models based on CT scans of healthy adults.
- Researchers reconstructed 60 atlas models and measured various morphological asymmetries such as the shape of the vertebral artery groove and the lengths of posterior arches.
- Results indicated that 11.67% of cases had asymmetric vertebral artery grooves, and varying degrees of asymmetry were present in the transverse processes and posterior arches, suggesting these variations should be considered in clinical practices.
Article Abstract
Objective: The aim of this study was to investigate the asymmetry of the adult atlas by deviation frequencies using 3-dimensional (3D) computer models based on the computed tomographic (CT) spine data from healthy patients.
Methods: Sixty adult atlas computer models were reconstructed from CT data of the cervical spine. The morphological asymmetries were investigated and measured with 3D software. Asymmetry in the morphology of the vertebral artery groove was observed, and the angles between the lines connecting the apices of transverse processes and the apices of anterior and posterior tubercles were measured. The lengths of the left and right posterior arches were measured, and the differences in values were categorized.
Results: We observed 7 cases (11.67%) with asymmetrical vertebral artery groove forms. There were 4 different categories: foramen-shaped, semi-foramen-shaped, deep, and superficial grooves. The asymmetry was of different shapes on both sides. Relative to the lines connecting the apices of anterior and posterior tubercles, the asymmetry frequency of the transverse processes and the posterior arch length was 6.67% and 16.67%, respectively.
Conclusions: For the specimens in this study, variation in morphology of the atlas was common. Asymmetry of apices of transverse processes, posterior arches, and vertebral artery grooves should be taken into account during clinical palpation, diagnostic imaging, and treatment including spinal manipulation.
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| http://dx.doi.org/10.1016/j.jmpt.2011.05.003 | DOI Listing |
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