In addition to the fevers of typhoid character, there are others showing a participation of the brain. These constitute the majority of pernicious fevers in severe malarial regions.

The symptoms which occur in these cases are the same as occur in diseases of the brain generally. In some cases the symptom complex can be differentiated; in others it simulates exactly an actual organic disease of the brain, most commonly, meningitis. As a rule, the disease picture is limited to one symptom, or this at least predominates from the beginning to the end.

The pernicious cerebral fevers constitute the principal contingent of Torti's comitates, and there are writers who even to day speak of comitatae cerebrales. Against this appellation we have nothing to say. Centuries of use have given it a citizen's privilege in medicine. Still we must remember that the cerebral disturbances are not always only culminating, but may occur, too, during typhoid pernicious (Torti's solitarise), when the comitatas, in Torti's sense, would not exist.

Among the general brain symptoms we may mention as common headache, vomiting, delirium, stupor, coma, convulsions, and incontinence. Among the local symptoms, hemiplegia, monoplegia, aphasia, and contractures of different groups of muscles.

On the part of the spinal cord (possibly, too, proceeding from the brain), tetanic convulsions.

We will detail the more frequently occurring pictures and illustrate them with examples, paying especial attention to the variable grouping of the symptoms.