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Variations of the interparietal bone in man
1Department of Anatomy, Medical College of Pennsylvania, Philadelphia 19129.
Journal of Anatomy
|June 1, 1987
Summary
A rare pre-interparietal bone variation was identified in an adult skull, presenting as two symmetrical pieces. This anatomical finding stems from the incomplete fusion of specific ossification centers within the interparietal bone.
Area of Science:
- Anatomical variations
- Human osteology
- Craniofacial development
Background:
- The interparietal bone, part of the human skull, typically fuses from multiple ossification centers.
- Variations in the fusion of these centers can lead to distinct anatomical presentations.
Purpose of the Study:
- To document and describe an unusual occurrence of a bipartite pre-interparietal bone in an adult human skull.
- To discuss the developmental origins and potential diagnostic challenges of such anatomical variations.
Main Methods:
- Gross anatomical examination of an adult human skull.
- Comparative analysis with standard cranial ossification patterns.
Main Results:
- A pre-interparietal bone was observed as two symmetrical segments, unfused at the midline.
- This bipartite presentation is attributed to the failure of fusion of a specific pair of ossification centers.
Conclusions:
- The presence of a bipartite pre-interparietal bone represents a rare developmental anomaly.
- Distinguishing such variations from sutural (Wormian) bones is crucial for accurate radiographic and anatomical interpretation.