Neuropsyche und Hirnrinde I: Der Bedingte Reflex (Und Seine Bedeutung in Der Biologie, Medizin, Psychologie Und Päda-Gogik). Ein Handbuch der experimentellen Reflexologie für Fachleute und Studierinde. By Dr. Med. N. E. Ischlondsky. Berlin and Vienna:  Urban & Schwarzenberg, 1930. Pp.  328. Neuropsyche und Hirnrinde II: Physiologische Grundlagen der Tiefenpsychologie (Unter Besonderer Berücksichtigung Der Psychoanalyse). Ein Handbuch für Studierende, Arzte, Psychologen und Pädagogen. By Dr. Med. N. E. Ischlondsky. Berlin and Vienna:  Urban & Schwarzenberg, 1930. Pp.  356.

The first volume of this series is a most thoroughgoing exposition of the phenomena included under the concept of conditioned reflexes. The first three chapters contain the historical remarks, the methodology, and the differentiation of the several types. Such topics as the secretory reaction, the general motor responses, the respiratory and vasomotor phenomena, and the electrogalvanic skin reactions are considered in detail and illustrated by cuts (partly in colors) of apparatus and of response arcs. One interesting scheme is that showing the action of conditioned reflexes in dreams.

The reciprocal action of serial conditioned reflexes, and the irradiation of nerve stimulations with their various manifestations are illustrated by human cases reconstructed following severe war injuries. Several chapters are devoted to the discussion of inhibitions and to fluctuations in the course of the conditioned reflexes, such as extinction, retardation and differential inhibitions with particular attention to irradiation, evolutionary significance, unitary action, relation to sleep states and to the special characteristics and peculiarities in different kinds of inhibitions. The manifestations of induction, the activity of the analyzers, and the principle of dominance are given due consideration in connection with behavior in various situations. Some space is also given to the phenomena of equilibrium between stimulation and inhibition processes in general and partial cortical reactions in sleep, and in hypnotic states in animals, particularly in guinea pigs. Certain disorders of this equilibrium and their consequences, and parabrotic states of the brain cortex, are described in an illuminating way.

The final chapter, which includes summaries, conclusions, and perspectives, contains several figures showing schemes of different conditioned reflex connections and possibilities. In all there are thirty-nine figures in the text, some in colors, nine pages of references to the literat