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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,...
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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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Articulations of the Vertebral Column

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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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Functional Classification of Joints

Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
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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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Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
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The frontal wishbone: anatomic and clinical implications.

Hernan Goldsztein1, Steven D Pletcher, Douglas D Reh

  • 1Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA.

American Journal of Rhinology
|January 19, 2008
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Summary

The interfrontal septal cell, or "frontal wishbone" (FWB), is common and often associated with frontal sinus disease. A larger FWB size increases the likelihood of frontal sinus pathology.

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Area of Science:

  • Otolaryngology
  • Radiology
  • Anatomy

Background:

  • The interfrontal septal cell, known as the "frontal wishbone" (FWB), was described over 50 years ago.
  • Its association with frontal sinus disease has only recently gained attention.

Purpose of the Study:

  • To correlate the incidence and dimensions of the frontal wishbone (FWB) with frontal sinus disease.

Main Methods:

  • 150 consecutive sinus CT scans were analyzed for FWB dimensions, drainage, and disease state.
  • Statistical analysis was used to link FWB configuration to frontal sinus disease presence.

Main Results:

  • FWB was present in 77.3% of patients.
  • 82% of frontal sinuses with mucosal thickening or opacification had concurrent FWB disease.
  • Larger FWB dimensions (>1 cm) were associated with a higher incidence of frontal sinus disease (p=0.02).

Conclusions:

  • The frontal wishbone (FWB) is an air cell within the interfrontal septum.
  • FWB may play a role in the development of frontal sinus disease.