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Related Concept Videos

Sutures of the Skull01:22

Sutures of the Skull

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The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
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Cranial Bones: Superior and Posterior View01:14

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The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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Overview of the Skull01:08

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The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
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Related Experiment Video

Updated: May 4, 2026

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
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Association between frontal sinus development and persistent metopic suture.

S Bilgin, U H Kantarcı, M Duymus

  • 1Department of Anatomy, Hacettepe University Faculty of Medicine, Ankara, Turkey. burcue@hacettepe.edu.tr.

Folia Morphologica
|January 10, 2014
PubMed
Summary
This summary is machine-generated.

Persistent metopic sutures were found in 9.7% of patients, with frontal sinus atrophy in 22.7%. This study found no significant link between persistent metopic sutures and abnormal frontal sinus development, suggesting incidental findings.

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Area of Science:

  • Anatomy
  • Radiology
  • Developmental Biology

Background:

  • Frontal sinuses are irregular cavities in the frontal bone, developing through childhood and puberty.
  • A persistent metopic suture is a known factor potentially linked to abnormal frontal sinus development.

Purpose of the Study:

  • To investigate the coexistence of persistent metopic sutures and abnormal frontal sinus development.
  • To utilize radiological techniques for assessing this association.

Main Methods:

  • Retrospective analysis of brain computed tomography and magnetic resonance images from 631 patients.
  • Categorization of frontal sinus development (atrophy, normal development) and identification of persistent metopic sutures.

Main Results:

  • Frontal sinus atrophy was observed in 22.7% of the study population.
  • Persistent metopic sutures were identified in 9.7% of the patients.
  • No statistically significant association was found between persistent metopic sutures and frontal sinus agenesis or dismorphism.

Conclusions:

  • The study found no significant correlation between persistent metopic sutures and abnormal frontal sinus development.
  • Existing literature suggesting a link lacks robust explanation.
  • The observed findings are considered incidental, with no causal relationship established.