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Related Concept Videos

Sutures of the Skull01:22

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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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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

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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
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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.
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Bone Formation by Intramembranous Ossification01:29

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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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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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Updated: Nov 25, 2025

Author Spotlight: Development and Evaluation of a Standardized Rat Model for Calvarial Suture-Bony Composite Defects
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Accessory Cranial Suture Leading to Abnormal Head Shape.

Garrison A Leach1,2, Nicole M Kurnik3,4, Ruth E Bristol4,5

  • 1Department of Surgery, Division of Plastic Surgery, University of California San Diego, San Diego, CA.

The Journal of Craniofacial Surgery
|December 18, 2020
PubMed
Summary
This summary is machine-generated.

An accessory parietal suture, rarely causing abnormal head shape, was observed in a 3-month-old infant. Cranial orthotic therapy successfully corrected the infant's head shape, marking a unique case in medical literature.

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Area of Science:

  • Craniofacial anomalies
  • Pediatric surgery
  • Developmental biology

Background:

  • Accessory cranial sutures are uncommon findings, typically incidental and not associated with abnormal head shape.
  • The parietal bone is the most frequent site for accessory sutures.

Observation:

  • A 3-month-old infant presented with multiple congenital anomalies.
  • The infant exhibited an abnormal head shape attributed to an accessory parietal suture.

Findings:

  • This case represents the first documented instance of an accessory cranial suture causing abnormal head shape.
  • The accessory parietal suture was identified as the cause of the infant's craniofacial deformity.

Implications:

  • This finding expands the known clinical spectrum of accessory cranial sutures.
  • Successful treatment with cranial orthotic therapy suggests a viable management option for similar cases.
  • Highlights the importance of considering accessory sutures in the etiology of infant head shape abnormalities.