いわゆる「単純性」精神薄弱に関する成因論的研究
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概要
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Thirty one cases (10 to 17 years old) of the so-called 'simple' oligophrenia were clinically studied and transversely examined on 25 checking items. From these results, the individual cases were analized on the etiological aspects and then the possibilities and limitations of causal analyses of the disease were discussed based on the present understandings. The conclusions were as follows : 1) The results from the transverse examinations were as follows : i. 'Cultural-familial' mental retardation (AAMD Code No. 81) was seemed to require further genetic investigations. ii. Causative significance of the peri-natal disturbances in simple oligophrenia was evaluated generally as very small. iii. Degeneration's signs were considered etiologically important, because they suggested the organ-dysgenesis at the early stage of fetal periods. iv. For diagnostic purposes, cautious neurological examinations should be executed in order to overlook subclinical brain damages such as 'soft sign'. v. On the E.E.G. studies, 'atypical sleep pattern' by the sleep activation, especially, 'extreme spindle' was commonly observed. vi. Majority of the present cases showed a 'late-mature tendency' of the sexual developments. 2) Generally speaking, simple oligophrenic states were resulted from the interaction of multi-dimensional and co-existing determinants. Their etiological varieties were determined by the number of causative factors and their evaluative weights. 3) It appears that even judging only from clinical view points this particular condition might include certain pathological groups which could not be considered as simple oligophrenia. 4) Almost all the subjects had the causal relations to the pre-natal or fetal period. Therefore, the most careful investigations should be done about the convergent causal factors during the cellular, germinal, and embryonal periods. 5) It was very hard to find a simple straight relationship to the mental retardation not only from the abnormal or pathological findings at the present semiological level but also from the causative factors at the level of etiological analysis. 6) This limitation of etiological stand points was considered to be a reflection of the relative limitation of general oligophrenia-diagnostics including clinical examinations at the present level. We also expected that the simple oligophrenia as a diagnostic category was going to separate to more accurate forms in the near future.
- 千葉大学の論文
- 1967-03-28
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