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Related Concept Videos

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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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
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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.
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Related Experiment Video

Updated: Feb 25, 2026

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
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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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Characterizing the skull base in craniofacial microsomia using principal component analysis.

S C Schaal1, C Ruff2, B I Pluijmers3

  • 1The Craniofacial Unit, Great Ormond Street Hospital Institute of Child Health, London, UK.

International Journal of Oral and Maxillofacial Surgery
|August 5, 2017
PubMed
Summary
This summary is machine-generated.

Craniofacial microsomia (CFM) causes significant skull base asymmetry, particularly around the glenoid fossa and mastoid process. This study reveals growth restriction in these areas, suggesting developmental issues linked to pharyngeal arches.

Keywords:
craniofacial microsomiafacial asymmetryprincipal component analysisskull base

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Area of Science:

  • Craniofacial anatomy
  • Developmental biology
  • Medical imaging

Background:

  • Craniofacial microsomia (CFM) is a congenital condition characterized by underdevelopment of facial structures.
  • Skull base asymmetry is a known feature of CFM, but detailed anatomical comparisons are limited.

Purpose of the Study:

  • To quantitatively compare skull base anatomy between affected and unaffected sides in unilateral CFM patients.
  • To compare CFM skull bases to those of a normal population.
  • To identify specific anatomical regions most affected by asymmetry and growth restriction.

Main Methods:

  • 3D computed tomography (CT) scans from 13 unilateral CFM patients and 19 controls (ages 7-12).
  • Manual landmarking and Principal Component Analysis (PCA) within a Point Distribution Model (PDM) framework.
  • Thin-plate splines used for shape transformation visualization.

Main Results:

  • Significant skull base asymmetry was observed in CFM patients compared to controls.
  • The glenoid fossa and mastoid process regions exhibited the most pronounced asymmetry and restricted growth.
  • PDM analysis successfully modeled shape differences between CFM and normal skull bases.

Conclusions:

  • The skull base in unilateral CFM demonstrates significant asymmetry, with specific regions showing impaired growth.
  • Findings suggest a developmental etiology related to the first and second pharyngeal arches.
  • Advanced imaging and modeling techniques provide valuable insights into CFM's anatomical complexities.