A METHOD OF STIMULATING AUTONOMIC NERVES IN THE UNANESTHETIZED CAT WITH OBSERVATIONS ON THE MOTOR AND SENSORY EFFECTS

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Abstract
A method employing implanted electrodes is described. The absence of pain fibers in the cervical and lower lumbar sympathetic chains and in the vagus nerve below the recurrent branch is shown by the absence of signs of disturbance with stimuli sufficient to produce motor effects. The splanchnic nerves and upper lumbar sympathetic chains contain pain fibers, which show evidence of becoming adapted to prolonged weak stimulation. The vagus nerve can be stimulated below the recurrent branch and the heart slowed 60 to 100 beats per min., without disturbance of the animal.

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