Human Skull Base Asymmetry Analysis

Abstract

Since the asymmetry is generally accepted entity which can be detected on human skulls, the goal of this study was to evaluate the presence and degree of skull base asymmetry and analyze it in relation to sex.The study included 60 skulls.Gender identification was estimated according to the external occipital protuberance, mastoid process, supraorbital margin and glabella.The asymmetry was assessed by analyzing the distance from the bilateral foramina (foramen ovale, foramen spinosum, carotid canal, foramen stylomastoideum) to the pharyngeal tubercle.Digital data were processed in the ImageJ software.The skull base asymmetry was found in all samples.Significant difference between the sides was found for the foramen ovale (p=.01).There was no significant difference in the skull base asymmetry with respect to sex.The highest index of asymmetry (7.38 %) was found in carotid canal and the lowest (5.22 %) was detected in relation to the foramen stylomastoideum.By comparing the index of asymmetry between the genders significant difference occurs for the carotid canal (p=.02).Skull base asymmetry was confirmed in our study.Oval foramen showed a significant degree of asymmetry.Knowledge of the variability of the skull base is the basis for an clinical and radiological evaluation of its changes.

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