INTRODUCTION In a paper on the "Localization of Intracranial Tumors," Byrom Bramwell1 has stated that in two cases reported by him in which the tumor involved the temporosphenoidal lobe, there were, practically speaking, no localizing symptoms: I have been in the habit of regarding the temporosphenoidal lobe as, par excellence, the silent area of the brain. In the relative order with which they can be most easily and certainly diagnosed . . . I would place tumors in the following situations: (1 and 2) pons Varolii and medulla oblongata; (3) centrum ovale (cases in which the optic radiations of Gratiolet are directly implicated) ; (4) tumors of the occipital lobe, involving the half-vision center or the optic radiations; (5) tumors of the motor area, in which the tumor produces irritation and gives rise to localized epileptiform convulsions; (6) tumors of the cerebellum; (7) tumors of the frontal lobe; (8) tumors of