{ 1. Resulting from { congenital defect. { 2. Resulting from an { obstacle to the { Defective { _Idiocy_ { development of the { development { { faculties supervening { of the { { in infancy. { faculties. { { { { 1. Resulting from { { { congenital defect. { { { 2. Resulting from an { { _Imbecility_ { obstacle to the { { { development of the { { { faculties supervening { { { in infancy. INSANITY. { { Lesion of { { 1. Intellectual-- { the faculties { { (_a_) General. { subsequent { _Mania_ { (_b_) Partial. { to their { { 2. Affective-- { development. { { (_a_) General. { { { (_b_) Partial. { { { { { 1. Consecutive to mania, { { { or injuries of { { _Dementia_ { the brain. { { { 2. Senile, peculiar to { { { old age. DEFECTIVE DEVELOPMENT OF THE FACULTIES Under this heading may be included idiocy, cretinism, imbecility, feeble-mindedness, and moral imbecility. =Idiocy= is congenital, and was defined by Esquirol thus: Idiocy is not a disease, but a condition in which the intellectual faculties are never manifested, or have never been developed sufficiently to enable the idiot to acquire such an amount of knowledge as persons of his own age, and placed in similar circumstances with himself, are capable of receiving. Idiocy commences with life, or at an age which precedes the development of the intellectual and affective faculties, which are from the first what they are doomed to be during the whole period of existence. Since the days of Esquirol, much improvement has been made in the care and treatment of the idiot; and it appears that he is capable of some, though in most cases slight, mental culture. The cases in which improvement takes place probably belong to imbecility, leaving the _idiot_ in the same condition as described by Esquirol.