Studies of neural structures essential for learning. II. The conditioning of salivary and striped muscle responses to faradization of cortical sensory elements, and the action of sleep upon such mechanisms.

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Abstract
Salivary responses in dogs, based upon acid, and limb movements, based upon electric shock to the skin, were conditioned to a faradic stimulus applied by means of a buried coil to visual sensory elements of the cortex. Satiation to food decreased conditioned responses to both acid and food although no significant change was noted in the unconditional response to acid. Successful differentiation between the cortical shock and both a buzzer and a bell was accomplished in one dog. The results are discussed in terms of Guthrie''s and Thorndike''s theories of learning and certain findings are shown to be not fully accounted for by these theories.

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