Related Experiment Video
Updated: May 11, 2026
Automated Midline Shift and Intracranial Pressure Estimation based on Brain CT Images
Published on: April 13, 2013
Precise Localization of the Posterior Clinoid Process in the Fetal Skull Base
Cansu Öztürk1, Zeynep Şencan2, Rümeysa İnce3
1Department of Anatomy, Faculty of Medicine, Gaziantep Islam Science and Technology University.
Objective:
To determine the precise position of the posterior clinoid process (PCP) in fetuses.
Materials And Methods:
Skull bases of 32 fetuses (11 males/21 females) aged 17 to 32 weeks in utero were included in the study. The distances of PCP to certain reference points were measured.
Results:
The distances of PCP to the foramen ovale, foramen rotundum, superior orbital fissure, anterior clinoid process, foramen magnum, and crista galli were measured as 7.70±1.86 mm, 6.99±1.65 mm, 6.07±1.85 mm, 3.85±1.10 mm, 15.34±3.38 mm, and 14.49±2.65 mm, respectively. All parameters were similar for both sides ( P >0.05). Apart from the distance of PCP to the foramen magnum, the remaining parameters were similar for both genders. This parameter was greater in males than females ( P =0.001). All parameters were greater in the third-trimester fetuses than the second-trimester fetuses. All parameters increased with advancing gestational weeks ( P <0.001). Linear functions were calculated for the distances of PCP to the crista galli ( y = 1.311 + 0.551 × age), to the foramen magnum ( y = 0.086 + 0.638 × age), to the anterior clinoid process ( y = -0.303 + 0.174 × age), to the superior orbital fissure ( y = - 2.013 + 0.338 × age), to the foramen rotundum ( y = 1.803 + 0.217 × age), and to the foramen ovale ( y = 0.760 + 0.290 × age).
Conclusion:
The measured distances increased with growth. The linear functions displaying the growth dynamics of PCP-related parameters may be used to estimate the distances.
More Related Videos
10:23Three-Dimensional Cephalometric Landmark Annotation Demonstration on Human Cone Beam Computed Tomography Scans
Published on: September 8, 2023
08:03Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
Published on: November 4, 2025
Related Concept Videos
01:08Overview of the Skull
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...
01:14Cranial Bones: Superior and Posterior View
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,...
01:27Cranial Bones: Lateral View
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...
01:22Sutures of the Skull
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...