Morphological Study of Superior Articular Facet of Atlas
Journal Title: Indian Journal of Anatomy - Year 2018, Vol 7, Issue 4
Abstract
Aim: The variations of superior articular facets of the Atlas vertebra has been less described in most of the anatomy textbooks though it is significant clinically. Different authors have described the superior articular facets based on constrictions, grooves and shapes. Present study deals with the division of the facet, constrictions , grooves, division, shapes and depth, its frequency and possible explanation. Materials and Methods: 100 superior articular facets of 50 dried, adult atlas vertebrae were collected from the bone library, Department of Anatomy, Subbaiah Institute of Medical Sciences, Shimoga. Results: Constrictions on medial margin were more frequent, 54% bilaterally followed by constrictions on both the margins about 46% on right side and 44% on left side. Grooves were observed about 46% on right and 44% on left side on the superior articular facets. According to constriction and groove, the facets were divided into complete, incomplete and non division. Non divisions were frequently seen, 54% on right and 56% on left side and complete divisions were less frequent, 8% on right and 2% on left side. Shapes of the facets were also defined according to its division. Kidney- shaped facets (54% bilaterally) were commonly observed followed by dumb-bell shape with left side predominance (36%). Depth of the facets was studied where concave was more common. Conclusion: The knowledge of variations of superior articular facets of Atlas is of importance to anatomists, anthropologists and clinicians since asymmetry may lead to restricted movements of atlanto-occipital joint and incomplete decompression of neuro-vascular structures.
Authors and Affiliations
Divya Shanthi D’Sa
Keywords
Related Articles
- EP ID EP509423
- DOI 10.21088/ija.2320.0022.7418.3
- Views 66
- Downloads 0
Sexual Dimorphism of Height in Adults of South Indian Population
68 males and 82 females of adult aged between 20 -35 years were measured in cms .The mean value of male height was 170.2 (SD ±7.0 ) and mean value of female height was 155.6 (SD ±5.9 ) and ‘t ‘ test value value was 13.7...
Morphometric Study of Adult Dried Human Scapulae in South Indian Population
Background: Scapula is one of the important components of shoulder girdle. According to clinical experts several shoulder pathologies found to have an anatomical basis. The scapula is one of the bones found to present se...
A Morphological Study on Cervical Vertebrae and It’s Clinical Relevance
Background: Cervical vertebrae are seven in number. C3-6 are typical whereas C1 (Atlas), C 2 (Axis) and C7 (Vertebrae prominens) are atypical. The cervical vertebrae are identified by the presence of foramen transversari...
Lateral Pterygoid Muscle
Lateral pterygoid muscle is one of the four classical muscles of mastication including masseter, temporalis and medial pterygoid. Main function of lateral pterygoid muscle is to open the mouth or lower the mandible at te...
A Study on the Shape of Sella Turcica
The importance of size and shape of the sella turcica in connection with the occurrence of symptoms of npituitary diseases has long been recognized. Present study was aimed to study normal shape of Sella turcica by radio...