Fetal Skull Diagrams with Landmarks PDF

Summary

This document presents diagrams and measurements of the fetal skull, including bones, sutures, and fontanelles. It displays various views and presentations of the fetal skull in a detailed manner for medical or biological study. It does not reference any specific exam board or year.

Full Transcript

## 1.7 THE FETAL SKULL ### Figure 1.7.1 - **Diagram showing the bones, sutures and fontanelles of the fetal skull** | Posterior | Anterior | |---|---| | Occipital bone | Frontal Bone | | Parietal bone | Temporal bone | | Lambdoidal suture | Sagittal suture | | Temporal suture | Coronal suture | |...

## 1.7 THE FETAL SKULL ### Figure 1.7.1 - **Diagram showing the bones, sutures and fontanelles of the fetal skull** | Posterior | Anterior | |---|---| | Occipital bone | Frontal Bone | | Parietal bone | Temporal bone | | Lambdoidal suture | Sagittal suture | | Temporal suture | Coronal suture | | Posterior fontanelle (lambda) | Anterior fontanelle (bregma) | ### Figure 1.7.2 - **Diagram showing sutures and fontanelles of the fetal skull** ### Figure 1.7.3 - **The areas and landmarks of the fetal skull** | Posterior | Anterior | |---|---| | Occipital protuberance | Vertex | | Sub-occipital area | Bregma | | Parietal | Temple | | | Eminence | | | Sinciput or brow | | | Glabella | | | The face | | | Root of the nose (nasion) | | | Mentum (chin) | | | Submental area | ### Figure 1.7.4 - **Diagram showing the transverse diameters and measurements of the fetal skull** - **DIAGRAM SHOWING THE TRANSVERSE DIAMETERS AND MEASUREMENTS OF THE FETAL SKULL AND SHOWING MOULDING CAUSING OVER-RIDING OF THE SKULL BONES AND THE REDUCTION OF SKULL DIAMETERS** | Posterior | Anterior | |---|---| | Bi-parietal diameter 9,5 cm | Bi-temporal diameter 8,2 cm | | Right | Left | **Vertex presentation** * Note: How the one parietal bone slips over the other parietal bone. * How the parietal bones over-ride the occipital bone and the frontal bones. * How one frontal bone slips over the other frontal bone. ### Figure 1.7.5 - **Diagrams showing the measurements of the fetal skull: antero-posterior diameters** - **S.O.B. = 9,5 cm = Fully flexed vertex presentation: occipito-anterior position.** - **S.O.F. = 10 cm = Slightly deflexed vertex presentation: occipito-posterior position.** - **O.F. = 11,5 cm = Defiexed vertex presentation: persistant occipito-posterior position.** - **S.M.B. = 9.5 cm = Fully extended face presentation: mento-anterior position.** - **S.M.V. = 11,5 cm = Not fully extended face presentation.** - **M.V. = 13,5 cm = Midway between deflexion and extension, brow presentation.**

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