186 I. W. BLACKBURN 



mand I have either found no reference to the artery at all, or a 

 mere mention of it, as by Cunningham, as a third anterior cere- 

 bral artery sometimes present, or by Quain, as found in 4.5 per 

 cent of cases. 4 



In an article in the Journal of Nervous and Mental Disease, 

 volume 12, no. 3, July, 1885, under the heading, "On a seldom 

 described Artery (Arteria Termatica) etc," Professor Wilder 

 describes the artery and gives it the name of Arteria Termatica, 

 from the place of location and chief distribution in his cases. 

 Professor Wilder thus describes the vessel which he found in a 

 large percentage of human brains examined : 



It usually soon divides into a right and left portion which supply 

 respectively the cinerea forming the surface of the triangular area ven- 

 trad of the rostrum on either side, and then extend around the genu to 

 the dorsal aspect of the callosum. 



In another place in the same paper, he describes its origin, as 

 most frequently from the place of junction of the precerebrals, 

 the pre-communicant being absent, an important observation 

 in connection with the present subject. In some respects most of 

 my cases of this artery have varied somewhat from Wilder' s 

 description, being as a rule larger, and following more closely 

 the description of the median anterior cerebral artery as de- 

 scribed by Windle, who says, 



It passes along the longitudinal fissure for two-thirds of the length of 

 the callosum, and divides into two branches, supplying the opposite 

 surfaces of the hemispheres. 



Windle found this artery present in 9 of the 200 cases examined, 

 and as his description of it is unqualified, it may be concluded 

 that most of his cases were of the larger-sized vessels, perhaps 

 more properly named the median anterior cerebral artery, though 

 I have no doubt that Wilder, Windle and I are describing the 

 same vessel . 



4 Quain's Anatomy, 1892. Other text books of Anatomy. 



