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Related Concept Videos

Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

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...
Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

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,...
Sutures of the Skull01:22

Sutures of the Skull

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...
Overview of the Skull01:08

Overview of the Skull

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.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...

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Related Experiment Video

Updated: Jun 18, 2026

Intravital Longitudinal Imaging of Vascular Dynamics in the Calvarial Bone Marrow
10:49

Intravital Longitudinal Imaging of Vascular Dynamics in the Calvarial Bone Marrow

Published on: April 11, 2025

Ellipsoid analysis of calvarial shape.

Petra A Jacobsen1, Devra Becker, Daniel P Govier

  • 1Washington University School of Medicine, St. Louis, Missouri, USA.

The Cleft Palate-Craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association
|November 26, 2009
PubMed
Summary

A new Ellipsoid Analysis method quantifies cranial shape, revealing distinct differences in skull form among patients with various synostosis types. This technique offers a refined approach to analyzing craniofacial morphology.

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Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
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Last Updated: Jun 18, 2026

Intravital Longitudinal Imaging of Vascular Dynamics in the Calvarial Bone Marrow
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Published on: April 11, 2025

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Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
08:03

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model

Published on: November 4, 2025

Area of Science:

  • Craniofacial morphology
  • Quantitative analysis
  • Medical imaging analysis

Background:

  • Accurate quantitative description of cranial shape is crucial for understanding craniofacial development and diagnosing conditions like craniosynostosis.
  • Existing methods for cranial shape analysis may lack specificity and broad applicability.

Purpose of the Study:

  • To develop a novel quantitative method for describing calvarial shape using ellipsoid geometry, termed Ellipsoid Analysis.
  • To pilot Ellipsoid Analysis by comparing calvarial shape in individuals with untreated unilateral coronal synostosis, metopic synostosis, sagittal synostosis, and normal controls.

Main Methods:

  • Three-dimensional skull reconstructions from high-resolution computed tomography scans were used.
  • Frontal, parietal, and occipital bones were segmented into six regions for each of the four study groups (10 patients each).
  • Points were extracted and fit to the least-squares nearest ellipsoid using a MATLAB-based program to derive relationships between ellipsoidal centroids.

Main Results:

  • Meaningful differences in length ratio, angular, and centroid distance relationships were observed among the synostotic groups.
  • The most significant difference was in the centroid distance PL-PR between sagittal and metopic synostosis patients.
  • Reproducible centroid relationships were derived, with centroid distances FL-PR and FL-PL, and angle OR-FR-PR being most commonly significant.

Conclusions:

  • Ellipsoid Analysis provides a refined quantitative approach to cranial shape analysis.
  • The method allows for direct comparison of symmetric and asymmetric cranial forms.
  • This technique shows potential for broader application in quantifying craniofacial morphology with increased specificity and general applicability.