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Cranial Bones: Superior and Posterior View01:14

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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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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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Anatomy of the Brain: Ventricles01:18

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There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen.
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Updated: Apr 17, 2026

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
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[The occipital sinus: a radioanatomic study].

M Gaumont-Darcissac1, L Viart1, P Foulon1

  • 1Laboratoire d'anatomie et d'organogenèse, faculté de médecine, 3, rue des Louvels, 80036 Amiens cedex 1, France.

Morphologie : Bulletin De L'Association Des Anatomistes
|February 10, 2015
PubMed
Summary

The occipital sinus is present in 43% of individuals, with variations in size and associated structures like the cerebellar falx appearing more frequently in children. Age influences occipital sinus presence and characteristics.

Keywords:
AnatomieAnatomyIRMMRIOccipital sinusSinus occipital

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Area of Science:

  • Neuroanatomy
  • Vascular anatomy
  • Pediatric anatomy

Context:

  • The occipital sinus, a venous structure, has not been extensively studied in diverse age groups.
  • Understanding its anatomical variations is crucial for clinical and surgical contexts.

Purpose:

  • To investigate the prevalence and anatomical features of the occipital sinus in both pediatric and adult populations.
  • To correlate the presence of the occipital sinus with age and associated anatomical landmarks such as the cerebellar falx.

Summary:

  • Magnetic resonance imaging (MRI) of 100 patients (0-86 years) was analyzed for occipital sinus presence, perimeter, and length, alongside cerebellar falx measurements.
  • An occipital sinus was identified in 43% of patients. Its prevalence was higher in children (62%) than adults (24%).
  • Children exhibited longer occipital sinuses and a higher incidence of associated cerebellar falx compared to adults, who had wider sinuses.

Impact:

  • This study reveals a significant age-related correlation with occipital sinus existence and morphology.
  • Findings suggest that anatomical variations of the occipital sinus, including its relationship with the cerebellar falx, differ between pediatric and adult demographics.
  • Provides valuable anatomical data for neurosurgeons, radiologists, and anatomists.