CRANIAL TOPOGRAPHY 



53 



should obtain a skull which has been divided in the median sagittal plane, 

 and should study the relationships of the various gyri and sulci of the 



FIG. 204. Diagram of Left Lateral Aspect of the Skull, showing the relations 

 of the Cerebral Sulci and the Branches of the Middle Meningeal Artery to 

 the Bones of the Cranium. 



BLACK. 



1. Bregma. 



2. Line of lateral fissure and lateral 



part of parieto-occipital fissure. 



3. Artificial line of separation between 



occipital lobe behind and the 

 parietal and temporal lobes in front. 



4. Lambda. 



5. Base line. 



6. Horizontal, 30 mm. long, parallel with 



base line. 



7. Lower end of vertical line. 



8. Vertical line 10 mm. long. 



9. Sylvian point in region of the pterion. 



10. Spheno-frontal suture. 



11. Squamo-parietal suture. 



12. Above aster ion, where the parietal, 



the occipital and the mastoid portion 

 of the temporal bone meet. 



13. Artificial line of separation between 



the posterior parts of the parietal 

 and temporal lobes. 



BLUE. 



1. Central sulcus. 



2. Post central sulcus. 



3. Posterior part of posterior branch of 



lateral fissure. 



4. Superior temporal sulcus. 



5. Middle temporal sulcus. 



6. Posterior end of calcarine fissure. 



7. Anterior horizontal branch of lateral 



fissure. 



8. Ascending branch of lateral fissure. 



9. Precentral sulcus. 



10. Inferior frontal sulcus. 



11. Superior frontal sulcus. 



RED. 



1. Stem of middle meningeal artery. 



2. Anterior branch of middle meningeal 



artery. 



3. Posterior branch of middle meningeal 



artery. 



supero-lateral surface of each hemisphere to the bones of the cranial vault, 

 and to the grooves for the main branches of the middle meningeal arteries, 

 HI 32,& 



