CENTRAL NI-:R\-()L'S SVSTluM— ROSOMOFF 259 



Figure 6 shows the coronal section of a dog in which the left middle cerebral 

 artery had been divided at 24° C. This brain is intact except for a 1 x2 mm. area 

 of infarction in the anterior hypothalamus which was not detectable clinically, and 

 a traumatic subcortical cyst in the pyriform lobe wliich corresponds to the site of 

 retraction at the time of operation. The remainder of the histology is normal. 

 Therefore, we conclude that hypothermia can protect against cerebral infarction 

 in the dog following occlusion of the middle cerebral arterv. 



Fig. 6. — Coronal brain sections of hypothermic dog with occluded cerebral artery. 



