. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. Fig. 3 Diagram of the central nervous system of the frog (left), from Sechenov (16). Stimulatiiin of the sites marked by crosses inhibited spinal reflexes, illustrating the hierarchy of neural levels and the domination of higher over louder. At the right is a diagram of the mechanism of the Pavlovian conditioned reflex (13). The animal makes adaptive adjustments to its environment by means of new links between the cortical analvsers and connections from them to subcortical, unconditioned reflex arcs. physi
. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. Fig. 3 Diagram of the central nervous system of the frog (left), from Sechenov (16). Stimulatiiin of the sites marked by crosses inhibited spinal reflexes, illustrating the hierarchy of neural levels and the domination of higher over louder. At the right is a diagram of the mechanism of the Pavlovian conditioned reflex (13). The animal makes adaptive adjustments to its environment by means of new links between the cortical analvsers and connections from them to subcortical, unconditioned reflex arcs. physiological knowledge of nervous activity to give rise to this idea! After the birth of this idea, it grew and ripened until, in our time, it has become an immense force for directing the contemporary investigation of the brain. Allow me at this fiftieth anniversary of the Reflexes of the Brain to invite your attention to the author, Ivan M. Sechenov, the pride of Russian thought and the Father of Russian physiology!' It is interesting to note that Sechenov, like Jackson a contemporary ot both Darwin and Spencer, was more directly influenced by Spencer's. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Council for International Organizations of Medical Sciences; Fessard, A. (Alfred); Delafresnaye, J. F. (Jean Francisque), 1919-. Springfield, Ill. , Thomas
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