THE SIGNIFICANCE OF THE CORTEX CONSIDERED 

 IN CONNECTION WITH A REPORT UPON A DOG 

 FROM WHICH THE ENTIRE CEREBRUM HAD 

 BEEN REMOVED BY PROF. GOLTZ.^ 



By Dr. Ludwig Edinger. 



{Frankfiirt-on- Main.) 



Thanks, to the kindness of Professor Goltz, of Strassburg, 

 I have been placed in possession of most valuable material 

 for cerebral anatomy — none other than the brains of a large 

 number of dogs from which a larger or smaller portion of the 

 cerebrum had been removed. 



The anatomical investigation of these brains requires a long 

 time and it is still far from completion. Nevertheless I shall re- 

 port at present upon a part of the results which have been ob- 

 tained from the study of the brain of that widely known dog 

 from which Professor Goltz succeeded, by a method hitherto un- 

 approached, in removing the entire cerebrum. This dog, which 

 survived the last operation more than eighteen months, was doubt- 

 less known to many of you. The unparalleled success of the 

 operation, the possibility of studying an animal entirely deprived 

 of cerebrum so many months after the disappearance of all irri- 

 tative phenomena, the valuable observations which have been 

 made upon the animal, and which Professor Goltz has pub- 

 lished in his Abhandlung iiber die Verrichtungen des Gross- 

 hirns, VII. (Pliiger's Archiv. Bd. LI.) all these have awakend 

 much interest in the anatomical results. Added to this is the in- 

 terest which such a preparation has in virtue of its manifold 

 secondary degeneration phenomena for those who realize upon 

 how slender footing our knowledge of the fibre tracts of the di- 

 encephalon now stands. 



' A lecture before the Medical Congress at Weisbaden. Printed from advance 

 proofs very kindly forwarded by the author. Translated by the editor. 



