utmost importance that the mutual reaction of mind and body upon each other should be thoroughly understood. This reaction is so constant, so intricate, and so complex that it is at times difficult to say which is cause and which effect. Does the depressed state of the mind cause the indigestion, or is a torpid liver the real seat of the melancholia?
The brain is the most delicately constructed organ in the entire body. In the lower animals the brain is simply the great nerve-center which, with its prolongation the spinal cord, presides over all the functions of life which differentiate the animal from the vegetable. In the human being the brain is much more highly developed and complicated; and is, in addition, the seat of the mind, the intellect, and the affections. Like all the other tissues of the body, the brain receives its nourishment from the blood-vessels which pass through it, and its healthy maintenance is in a direct ratio to the condition of its blood-supply.
A most interesting psychologic study is found in the case of cerebral paralysis of young children, where there is mental defect amounting to stupidity or imbecility, accompanied by extensive paralysis of the body, so that the child is not able to sit up. With the gradual improvement of the physical condition, so that the muscles become firm and the child can sit, stand, and even walk, there is a corresponding mental development; from being stupid and dull, the expression of the face brightens and becomes intelligent; the child talks quite as well as other children of its age, and sometimes becomes really intellectually precocious. Here we see the development of the brain as a direct result of the improved physical condition. In certain cases of insanity, on the contrary, we find that the wasting away of the body results from the disease of the brain, i. e., the disease of the brain has wrought the wreck of the body.
From these pathologic studies, or studies of how the diseased state of the brain and body may be overcome by physical development, on the one hand, and, on the other hand, how the healthy body may be wrecked by disease of the brain, we will turn to a consideration of the effect of the development of the mind and intellect upon the physical health.
On a girl's entering Vassar College an exact and detailed physical examination is made by the resident physician, a health record is kept during her stay there, and at the time of her graduation a final physical examination is made. As a result of these statistics Dr. Thelberg says: "These statistics, now covering a number of years, show that not only can girls profitably take a college education, that is accomplished; but will prove that grave physical imperfections can be corrected in the period between eighteen and twenty-two years of age, coincidently with the development of the mind along the lines of college work; the college work, if not excessive in amount, being a real and most important factor in the physical development."
But a still more striking proof can be cited of the beneficial result of mental and intellectual occupation upon the bodily health. At Vassar a great deal of attention is very properly paid to general hygiene and the physical development, in addition to the natural advantages of outdoor life in the country.
Take, for example, a woman's medical college located in the city: the four years' course places the greatest strain on both mind and body; practically no time is left for recreation, and very much too little time is spent in sleep; the amount of exercise taken is the minimum. Yet in spite of all these disadvantages under which the young women labor, a great many of them who enter far below par in health, or, indeed, on the fair road to become chronic invalids, graduate very greatly improved in health.
The Emotional Nature.-- Formerly much more than now, owing to the defective methods of her education and mode of life, the emotional nature of woman was allowed to run riot. The child was coddled; the girl was allowed to grow up without any of the discipline which young men receive in their college and business life, and little or no attention was paid to her physical development. The woman naturally became a bundle of nerves, highly irritable, unreasonable, and hysterical. All this reacted in the most detrimental manner upon her physical health.
The seed for much of this emotional hyperesthesia is sown in childhood. From birth until the end of the eighth year should be one grand holiday. During this time the child develops very rapidly, especially during the first two years of life. And at the end of the eighth year the brain has attained to within a few ounces of
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