Various groups of acute and subacute cerebral problems associated with mental deterioration have been presented, and the method of management indicated, which has been associated with arresting of the mental deterioration or with actual improvement in many cases where effectual cooperation and demonstrable dehydration have been accomplished.That the results may indicate a possible line of approach in the more chronic type is suggested, as well as the need for preventive measures instituted along the lines of disturbed fluid metabolism of the body. This requires careful consideration in the management of such problems before profound states of deterioration have occurred.Abstract Teaser