6 PSYCHOTHERAPY : SCIENTIFIC AND RELIGIOUS chap.
tonsils or sinuses have been known to predispose individuals to non-adjustive behaviour. Sometimes these conditions produce a lack of energy and ready fatigue which handicaps adjustive ability. In other cases infections seem to cause restlessness, irritability and ' nervousness \ Similar effects have been observed in persons whose toxic condition arises from intestinal disturbances. Any condition that generally weakens the body may have an influence on the quality of adjustment.
Infectious diseases that attack the nervous system directly have a most injurious effect on conduct and adjustment. Several severe disorders of this type may develop from syphilis. The most serious syphilitic infection of the nervous system is general paresis. The onset of this disorder is usually in the prime of life. Its early symptoms often include defective judgment and tendencies to excesses that are sometimes incorrectly ascribed to faults of character. Diagnosis of paresis is made by the discovery of the germ of syphilis in the cerebrospinal fluid. This is a serious disease and hospital care is required, but methods of treatment are fairly effective if begun in the early stages. Juvenile paresis is a different form of this infection, arising in childhood from congenital syphilis. It has many physical and mental symptoms, including mental deterioration with increasing dullness. It has been alleged that the first signs of juvenile paresis are often stealing, truancy and queer behaviour. Although only a small part of such conduct can be due to juvenile paresis, physiological tests, to determine if it is present, are advisable in incorrigible, cases.
Considerable interest has been shown in the study of the after-effects of another infectious disease of the nervous system, encephalitis lethargica. commonly called