Topic
Interparietal bone
About: Interparietal bone is a research topic. Over the lifetime, 47 publications have been published within this topic receiving 737 citations. The topic is also known as: os interparietale & inca bone.
Papers
Journal Article•
TL;DR: This is the true interparietal bone which has migrated from the parietals of lower animals during evolution to become part of the occipital bone in man.
Abstract: The squamous part of the occipital bone consists of 2 parts, supraoccipital and interparietal. The supraoccipital develops both in cartilage and membrane. At the upper margin the bone lying between the superior and highest nuchal lines known as the torus occipitalis transversus is ossified in membrane by a pair of centres. This part of the supraoccipital represents the original membranous part of the primitive occipital bone of lower animals where the interparietals form part of the parietals. This segment of bone is labelled as the intermediate segment which probably never separates from the cartilaginous supraoccipital. The interparietal bone lying above the highest nuchal lines develops in membrane by 2 pairs of centres, 1 pair for the lateral plate and the other for the medial plate. Each centre consists of 2 nuclei. Failure of fusion between these centres or their nuclei with each other and the supraoccipital may give rise to various anomalies in the interparietal region which are discussed. This is the true interparietal bone which has migrated from the parietals of lower animals during evolution to become part of the occipital bone in man. When it appears as an anomaly in the form of an independent separate bone, the suture between it and the supraoccipital lies at the level of highest nuchal lines. There is no pre-interparietal bone.(ABSTRACT TRUNCATED AT 250 WORDS)
62 citations
Journal Article•
TL;DR: The study was conducted on 40 adult Nigerian skulls which were examined for the presence of interparietal and pre-interparietal bones and found only one interParietal bone was found.
Abstract: The study was conducted on 40 adult Nigerian skulls which were examined for the presence of interparietal and pre-interparietal bones. Only one interparietal bone was found (2.5% of the present series) while a single pre-interparietal bone was found in four skulls (10%) and multiple pre-interparietal bones in one skull (2.5%).
45 citations
Journal Article•
TL;DR: In an adult skull a pre-interparietal bone was found to be present in two symmetrical pieces on either side of the midline, the result of failure of fusion of a third pair of centres with each other on the midlines.
Abstract: In an adult skull a pre-interparietal bone was found to be present in two symmetrical pieces on either side of the midline. This is the result of failure of fusion of a third pair of centres with each other on the midline. The possibilities of variations due to non-fusion of various pairs of the centres in the interparietal area and their differentiation from surrounding sutural bones are discussed.
45 citations
Journal Article•
TL;DR: The development of ossification centres in the squamous portion of the human occipital bone is described on the basis of anomalies observed in a large series of skulls to derive the supraoccipital and interparietal parts.
Abstract: The development of ossification centres in the squamous portion of the human occipital bone is described on the basis of anomalies observed in a large series of skulls. The interparietal part develops from three pairs of centres in membrane--one pair for the lateral plates, one pair for the central piece, and the third pair representing the pre-interparietals. The supraoccipital part develops from five centres in cartilage--two centres for each lateral segment and a single centre for the central segment. The supraoccipital part extends from the posterior margin of the posterior condylar fossae to about 2 cm above the external occipital protuberance and about 0.4 cm above the superior nuchal line near the lambdoid suture.
44 citations
Journal Article•
TL;DR: Sutural bones at the lambda are differentiated from the bone developed from the pre-interparietal centres, which is present behind the lambda within the territory of the membranous occipital bone.
Abstract: The membranous part of the squamous occipital bone, above the highest nuchal line, develops from two pairs of centres and an occasional third pair, pre-interparietal, which may develop anterior to the interparietal centres. Previously it was considered that the pre-interparietal bone is found at the lambda, anterior to the interparietal, which is also a common site for the formation of sutural bones. In this study, on the basis of anomalies observed in a large series of skulls, sutural bones at the lambda are differentiated from the bone developed from the pre-interparietal centres. A separate pre-interparietal bone is identified by its shape and position. It is present behind the lambda within the territory of the membranous occipital bone.
43 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 2 |
| 2017 | 1 |
| 2016 | 4 |
| 2015 | 2 |
| 2014 | 4 |
| 2013 | 2 |