AND PERSONALITY 



blooded animals, van't Hoff's law, which we have evoked 

 to interpret the biological advantage of the warm-blooded 

 state, and the brain-metabolism law that enabled us to open 

 the way to ascertain the weight of the thinking part of the 

 brain all these harmonize the data that we have collected. 



From the foregoing we offer a neuroendocrine formula for 

 civilized man. Civilized man possesses no organ not pos- 

 sessed by native man or wild and domestic animals. Civi- 

 lized man, when evaluated by the power formula, possesses 

 a larger thinking brain and thyroid gland than any other 

 animal, coupled with an upright posture, a manipulative 

 hand, and in comparison with wild and domestic animals, 

 small adrenal glands, celiac ganglia, and plexuses. 



The brain of civilized man possesses a greater number of 

 energy units or brain cells than is possessed by native man 

 or any other animal of comparable size. It possesses also a 

 greater number of lines of communication among the various 

 parts of the brain itself as well as to the muscles, especially 

 those of the hands and feet, for executing the many activities 

 of civilized man. 



In man, when there is a break in continuity between the 

 driving brain and the adrenal-sympathetic system in 

 other words, when there is a physiological bisection the 

 power to express the emotions is lost. 



In my service with the American Ambulance at Neuilly, 

 France, during the First World War, in 1914 and 1915, a 

 ward of eighty soldiers who had suffered cross lesions of the 

 spinal cord was placed in my charge. The personality of each 

 of these soldiers was bisected by a bullet that divided the 

 spinal cord high up. Although these unfortunate men were 

 paralyzed from the point of injury down, they remained 

 calm, placid, and intellectual in spite of their incapacity, 

 in spite of their dilemmas, and in spite of air raids. Their 

 minds had been severed from their adrenal-sympathetic 

 nervous systems. "The line was down." They had lost the 

 power to worry or to fear. 



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