Diseases of the nervous system : a text-book of neurology and psychiatry . y a termindicating an inherent defect. These defects range all the way fromwell-marked imbecility among the younger children up through thegrades of the so-called backward children. For the most part, the 776 IDIOCY, IMBECILITY, AND DEFECT GROUPS different grades of the moron, of the feeble-minded, and the lightermeasuring rod which has been used for determining these conditionshas been the Binet-Simon scale of intelligence tests, and the treatmentwhich has been applied has been the segregation of these defectivechildre
Diseases of the nervous system : a text-book of neurology and psychiatry . y a termindicating an inherent defect. These defects range all the way fromwell-marked imbecility among the younger children up through thegrades of the so-called backward children. For the most part, the 776 IDIOCY, IMBECILITY, AND DEFECT GROUPS different grades of the moron, of the feeble-minded, and the lightermeasuring rod which has been used for determining these conditionshas been the Binet-Simon scale of intelligence tests, and the treatmentwhich has been applied has been the segregation of these defectivechildren from the general school population into classes and sometimeswhole schools devoted particularly to them, thereby gaining both theadvantage of the application of special educational efforts to thesechildren and the relief of the normal child from the drag back to whichhe was subjected by having the defective in the same class with him. Many of the mental defects, it must be borne in mind, are onlyrelative affairs and are dependent upon general conditions of ill health,. Fig. 331.—In center a moron, aged twenty-four years; mentally, ten years. At right,moron, aged eleven years; mentally, eight years. At left, imbecile, aged nine years;mentally, six years. such, for example, as are due to adenoid vegetations in the posteriorpharynx. Under such conditions of ill health development is impairedand does not proceed at a normal rate. With anemia, impaireddigestion, and infected tonsils, which produce a constant toxemia,the child cannot be expected to proceed in his development with normalrapidity. In addition to such conditions as this it is found that thedefect is often due to high grades of myopia which make it impossiblefor the child to learn, because he cannot see to read or even see theblackboard. In the same way deafness and other quite gross lesionshave been found to account for many of these conditions. It should beremembered, too, that the child may have a neurosis or a ps
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