I observed forty-two doub:e handicapped juvenile patients and got the following results.
1. C. P. is the largest in number, the second one is the sequela of encephalitic process, and they are extremely backward in intellectuality as well as advancing of speech ability.
2. The disturbances at perinatal stage (immatureness, asphyxia, icterus) influence greatly on these pathogenesis.
3. Unhealthiness of the mothers at pregnancy is also one of the cause.
4. The occuring time of the pathogenesis is presumed at perinatal stage in a half of the number.
5. C. P. often coexists with epilepsy as wall as feeble mindedness.
6. The dislocation of hip joint, the abnormality of testicle and microcephalus are often seen.
7. Paralysis and other motor disturbances are remarkable.
8. The difficulty of eating or disturbance of sphincter control is also serious.
9. Behavior problem are pronounced mostly in mental deficiencies.
10. The family environments of the patients are bad.