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This excellent book presents the results of six years of research, conducted for the most part in the division of neurology and neurosurgery of the University of Chicago. The book deals with the thalamus of the rhesus monkey (Macaca mulatta), but enough work was done on the chimpanzee to show that the results hold also for this primate and are directly applicable to man. As a result of these years of investigation it has been possible for the author to present a classification of the thalamic nuclei based on the connections established by the ascending sensory pathways terminating in the thalamus and those established by the fibers running from the thalamus to the cortex. This classification does not differ greatly from those reached by Papez and Crouch on the basis of a histologic study of the normal thalamus.
The author recognizes within the thalamus: (1) an anterior nuclear group, consisting