IN A GROUP of patients with altered behavior in association with intracranial disease1 a type of language disorder was noted in which an incorrect term was substituted for the proper name of an object. Such misnaming has been generally classed as "verbal paraphasia." It has been considered a type of receptive aphasia2 and has been attributed to a lesion in the Wernicke area. In the present study of 30 patients an attempt has been made to investigate the relation of this alteration in language to (1) aphasia, (2) the character and localization of the anatomical lesion, (3) the concomitant abnormalities in the electroencephalogram, and (4) the associated alterations of behavior. MATERIAL AND METHOD Of the 30 patients, 19 had brain tumors; 7 had subarachnoid hemorrhage from aneurysms of the circle of Willis; I had a head injury; 2 had meningoencephalitis, and in 1 the disturbance in language appeared during