Oh my! I never heard that--do you have any references?
From Poultry Breeding & Genetics, Crawford, Elsevier Pg 211:
Cerebral Hernia..... "Krautwald (1910) showed that the underlying cause of the hernia was an accumulation of fluid in the third & fourth ventricles of the brainthus causing an upthrustingof the cerebral hemispheres & the overlying frontal bones. ......"
From Poultry Breeding & Genetics, Crawford, Elsevier Pg 211:
Cerebral Hernia..... "Krautwald (1910) showed that the underlying cause of the hernia was an accumulation of fluid in the third & fourth ventricles of the brainthus causing an upthrustingof the cerebral hemispheres & the overlying frontal bones. ......"