Nervous and mental diseases . vitiligo) ; local or general hypertri-chosis ; partial or complete absence or fetal state of the nails ; melanismof the skin ; pigmentary or vascular nevi ; molluscum ; ichthyosis ;vitiligo ; albinism ; pigmented spots. Anomalies of Motor Function.—Delay in acquiring a knowledgeof the proper use of muscles for walking, eating, and the like mayoften be regarded as an index of degeneracy. Where ordinary etio-logical factors may be excluded, tremors, ties, epilepsy, and nystagmusmav have a similar value. Even when not congenital, thev often indi-cate hereditary insta


Nervous and mental diseases . vitiligo) ; local or general hypertri-chosis ; partial or complete absence or fetal state of the nails ; melanismof the skin ; pigmentary or vascular nevi ; molluscum ; ichthyosis ;vitiligo ; albinism ; pigmented spots. Anomalies of Motor Function.—Delay in acquiring a knowledgeof the proper use of muscles for walking, eating, and the like mayoften be regarded as an index of degeneracy. Where ordinary etio-logical factors may be excluded, tremors, ties, epilepsy, and nystagmusmav have a similar value. Even when not congenital, thev often indi-cate hereditary instability of the nervous system. Anomalies of Sensory Function.—The numerous anomalies offunction in connection with the eye have already been deafness has also its significance. So, too, have hereditaryforms of migraine and neuralgia. Certain defects or excesses in generalcutaneous sensibility have been noted as frequent among several excellent writers on this subject have stated that a. Fig. 302.—Hypertrichosis in a female imbecile. 724 MENTAL DISEASES. general anesthesia is not uncommon, especially among lower classesof degenerates. In some instances there is hyperesthesia. Anomalies of Speech.—It may be questionable as to how farstammering and stuttering are to be looked upon as functional degen-erative stigmata, but they are certainly found more often in childrenwith a neuropathic inheritance than in children with good in the acquisition of language and complete or partial defect ofspeech have more significance. Anomalies of Genito-urinary Function.—Sexual irritability,impotence, sterility, and urinary incontinence must be considered asindices of neuropathic disposition. Retardation of puberty in bothsexes, but especially in the male sex, is a noteworthy indication. Anomalies of Instinct or Appetite.—It has been pointed outthat, among all degenerates, there is a taste or appetite for certain foodsor drugs which


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