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The author of this monograph from East Germany has collected a series of 34 patients who had various types of aphasia or related disorders. He has attempted to correlate the clinical symptoms with their anatomical substrate, as revealed by autopsy or by the less precise methods of surgical intervention, roentgenology, or electroencephalography. In general, his findings substantiate previously held beliefs, eg, that motor aphasia of the Broca type is found with more anteriorly placed lesions (especially with involvement of the third frontal convolution), that receptive difficulties occur with more posteriorly placed lesions, and that the region of the angular gyrus is involved in the "Gerstmann syndrome." However, he believes that the category of motor aphasia has been misused in the past to cover both genuine deficits of the Broca type, correlated with anterior lesions, and what he calls "ideokinetic motor aphasia," which he attributes to parietal lesions. These subclassifications derive