A study of incidence of interparietal bones in adult human dry skulls

Abstract

Introduction: The inter-parietal part of squamous occipital bone which lies above the highest nuchal line develops from membranous ossification. The failure of fusion of ossification centres in this region leads to the development of interparietal bones. These bones are very rare in occurrence as compared to the other sutural bones. In this study, the objectives were to find the incidence of interparietal bones in adult human dry skull of Gujarat region.
Materials and method: The study included a total number of 250 human adult dried skulls from various medical colleges and dental colleges of Gujarat region. The skulls were studied for the gross incidence, number, size, shape, position and number of fragments of the interparietal bones. Observation and Results: in present study Out of 250 skulls were examined by us, 24 skulls show the presence of interparietal bone. The incidence of interparietal bones in present study was 9.6%. Conclusion: The study has provided information on the squamous part of occipital bone, the interparietal bones, their incidence, and morphology. The knowledge of these variants is of importance to the neurosurgeons, radiologists and morphologists and forensic expert for comparison of skull bone.