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Related Concept Videos

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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The superior view of the cranium shows the frontal and paired parietal bones.
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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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Temporal Bone Pathology Secondary to Head Trauma-A Human Temporal Bone Study.

Mio Uchiyama1,2, Rafael da Costa Monsanto3, Irem Gul Sancak1,4

  • 1Department of Otolaryngology Head & Neck Surgery, University of Minnesota.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|July 5, 2021
PubMed
Summary

Head trauma can cause hearing loss. Temporal bone (TB) pathology, including hair cell loss and cochlear hemorrhage, was more severe in head trauma cases without skull fracture compared to those with fractures.

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Pathology

Background:

  • Head trauma is associated with temporal bone (TB) pathology and hearing loss.
  • Previous studies have not directly compared TB pathology in head trauma cases with and without skull fractures.

Purpose of the Study:

  • To investigate differences in temporal bone pathology following head trauma based on the presence or absence of a skull fracture.

Main Methods:

  • Analysis of 34 temporal bones (TBs) from head trauma donors (20 with fracture, 14 without) and 25 controls.
  • Histological evaluation for TB fractures, ossicular injury, cochlear hemorrhage, hair cell loss, spiral ganglion cell loss, stria vascularis damage, and endolymphatic hydrops.

Main Results:

  • Significant outer hair cell loss, spiral ganglion cell loss, and cochlear hemorrhage were observed in head trauma cases.
  • These pathologies were more pronounced in TBs from donors without skull fractures.

Conclusions:

  • Head trauma can lead to sensorineural hearing loss, particularly affecting high frequencies.
  • Temporal bone pathology is more severe in head trauma cases without associated skull fractures.