Attempts to train the spinal cord

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In hope of comparing symmetrical trained and untrained centers in the spinal cord of the cat histologically, an attempt was made to establish linkage between afferent nerves from the tail and the flexor center on one side. Concurrent stimulation of the tail and hind foot in a spinal cat failed to establish linkage. Intact cats were trained to stop electric shocks to the tail by flexing the right hind leg, thus breaking the stimulating circuit. The results--variation in the voltage to tail required to cause flexion, increased threshold voltage on distraction, much greater latency of flexion to tail stimulus than in the flexion reflex, rise in threshold voltage under light etherization, complete absence of linkage after spinal transection--all showed that learning was in the brain, not in the spinal cord. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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