A STUDY ON THE DEVELOPMENTAL MECHANISM OF LEARNING DISORDER
Project/Area Number |
04610155
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Educaion
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Research Institution | NAGASAKI UNIVERSITY |
Principal Investigator |
KAWASAKI Chisato NAGASAKI UNIVERSITY,SCHOOL OF ALLIED MEDICAL SCIENCES,ASSOCIATE PROFESSOR, 医療技術短期大学部, 助教授 (50147302)
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Project Period (FY) |
1992 – 1994
|
Project Status |
Completed (Fiscal Year 1994)
|
Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1994: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥500,000 (Direct Cost: ¥500,000)
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Keywords | learning disabilities / intrauterine growth retardation / home environment / neonatal behavior / 注意欠陥・多〓障害 / 新生児行〓 / 新生児行動 / 気質 / 神経心理学的所見 / 神経学的微徴候 |
Research Abstract |
Intrauterine growth retarded infants(IUGR)who are the high-risk group of learning disorders were followed up from neonatal period to the age of 4 years in order to observe the influences of genetic and environmental factors on neuro-behavioral development. The subject is a total of 86 subjects consisting of 29 cases of IUGR without severe perinatal complications and 57 healthy control infants. They were examined by Brazelton's neonatal behavioral assessment scale and reviewed their detailed perinatal medical records including fatal heart rate monitoring. Afterwards, an examiner visited their home at the age of 6,12,24,36 month and evaluated cognitive (Bayley Mental Test and McCarthy Test), motor (Bayley Motor test and McCarthy test), behavior (Bayley Behavioral Rating and Carey's temperament questionnaire) and environmental (England's Mother-infant interaction scale and Caldwell's HOME) status. Statistical analysis of IUGR and control group disclosed a significant difference between two
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groups. IUGRs showed significantly lower score than controls in the regulation of sleep-wakefulness state, habituation and motor performance at neonatal period. On the other hand, there was not significant difference in orientation item. Behavioral problems such as hyperactivity and withdrawal were more frequently occurred in IUGR group during the age of 6 month to 4 years. Those behavioral problems were most evident around the age of 2 years. Multiple regression analysis of the evaluated item scores disclosed the influences of genetic and environmental factors on developmental outcome. There were significant correlations between mother's age and perinatal complications, mother's education and perinatal complications, and perinatal complication and neonatal behavior such as state regulation. Also there were significant correlations between the mental-motor development at the age of 2 years and neonatal cognitive-behavioral characteristics. There was significant correlation between the mental-motor development at the age of 3,4 years and environmental factors such as mother-child interaction and physically rich environment, on the other hand, the direct influence of neonatal behavior on the development at the age of 3.4 years was not demonstrated. These data revealed that the toddler's minor neuro-behavioral disturbances which may develop to learning disorder occurred more frequent than in control group. Also there is the mechanism whereby genetic and environmental factors influences on neurobehavioral development. Less
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Report
(4 results)
Research Products
(22 results)