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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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Overview of the Skull01:08

Overview of the Skull

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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.
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...
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Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

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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.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
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Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

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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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Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

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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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Neurulation01:30

Neurulation

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Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
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Related Experiment Video

Updated: Aug 20, 2025

Analyzing Craniofacial Morphogenesis in Zebrafish Using 4D Confocal Microscopy
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Cranium growth, patterning and homeostasis.

Phillip S Ang1,2, Matt J Matrongolo1,3, Maeson L Zietowski2

  • 1Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854, USA.

Development (Cambridge, England)
|November 21, 2022
PubMed
Summary
This summary is machine-generated.

This study explores craniofacial development, focusing on how signaling pathways and progenitor cells regulate skull bone growth and homeostasis. It examines factors influencing cranial suture patency and craniosynostosis, linking skull development to brain health.

Keywords:
Craniofacial developmentCraniosynostosisOsteogenic frontOsteoprogenitor cellSupraorbital mesenchymeSutural stem cells

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Area of Science:

  • Developmental Biology
  • Craniofacial Development
  • Molecular Signaling

Background:

  • Craniofacial development relies on intricate spatiotemporal regulation of signaling pathways.
  • Understanding progenitor cell populations refines knowledge of skull patterning, bone mineralization, and tissue homeostasis.
  • Classical and recent studies emphasize developmental and signaling mechanisms governing the osteoblast lineage in the calvaria.

Purpose of the Study:

  • To review advancements in craniofacial development, focusing on the calvaria.
  • To highlight the roles of osteoprogenitor cells and cranial suture-derived stem cells.
  • To discuss signaling pathways controlling suture patency and their link to craniosynostosis.

Main Methods:

  • Review of classical and recent scientific literature.
  • Emphasis on developmental and signaling mechanisms.
  • Analysis of studies on osteoprogenitor cells and stem cells.

Main Results:

  • Osteoprogenitor cells and cranial suture-derived stem cells are crucial for calvarial growth and homeostasis.
  • Specific genes and signaling pathways regulate cranial suture patency.
  • Perturbations in these pathways lead to craniosynostosis.
  • New insights reveal interactions between skull and cerebrovascular development.

Conclusions:

  • Precise regulation of signaling pathways and progenitor cells is essential for normal craniofacial development.
  • Disruptions in these processes can cause craniosynostosis.
  • Interactions between skull and brain development have implications for cerebrospinal fluid dynamics and waste clearance.