3 6 4 



THE BRAIN 



the sulcus cinguli, is termed the prcecuneus \ it is the medial 

 part of the superior parietal lobule. 



Cutting the supero-medial border a short distance above 

 the occipital pole is the calcarine fissure. It is a deep fissure 



Olfactory bulb 

 Medial orbital gyrus ' t 



Orbital sulcus 

 Anterior orbital gyr 



Lateral orbital gyrus_.X 



asterior orbital gyrus./^ ^- 



Stem of lateral 

 fiss 



Rhinal 



Gyrus rectus 



Olfactory sulcus 



Olfactory tract (cut) 



Optic 



Anterior perforated 

 substance 



Infundibulum 

 ,- Optic tract 

 ^Mamillary body 



fissure 

 Fusifo 



gyrus 

 Inferior 

 temporal 

 sulcus 

 Inferior 

 temporal 

 gyrus 

 Calcarine 

 fissure 



Medial occipital 

 border crossing 

 gyrus lingualis 



Calcarine fissun 



Infero-lateral border 



Sulcus lunatus 



Calcarine fissure 



Sulcus lunatus 



Calcarine fissure 



Sulcus for superior sagittal sinus 

 FIG. 138. Inferior surfaces of Hemispheres (semi-diagrammatic). 



which runs forwards on the medial surface. It turns down- 

 wards across the anterior part of the medial occipital border 

 and at that point it is joined by the parieto-occipital fissure. 

 Then it runs obliquely downwards and forwards in the 

 posterior part of the inferior surface below the splenium of the 



