THE CEREBRAL CIRCULATION, ARTERIES. 



Fig. 10. Arterial circle and its branches on the base of the cerebrum. 

 (Gordinier after Duret.) 



On the left side of the brain the temporal lobe is cut away so as to open the inferior and 

 posterior horns of the lateral ventricle. The mid-brain is divided close above the pons and 

 the posterior cerebral arteries are cut at their origin from the basilar. 



Ganglionic arteries: am. Antero-median group arising from the anterior cerebral, al. An- 

 tero-lateral group, from the middle cerebral, pm, pi (on the optic thalamus). Postero- 

 median and postero-lateral groups, from the posterior cerebral. 



Chorioidal arteries: a ch. Anterior, from the internal carotid, p ch (on the splenium). Pos- 

 terior, from the posterior cerebral. 



Cortical arteries: I, I. Inferior internal frontal, from the anterior cerebral. 2. Inferior ex- 

 ternal frontal. 3. Ascending frontal. 4. Ascending parietal, and 5, temporo-parietal from 

 the middle cerebral. 6. Anterior temporal, 7, posterior temporal, and 8, occipital, from the 

 posterior cerebral. 



