精神発達遅滞児のLateralityの確立と上肢両側性運動

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The purpose of this study is to investigate the relationship between the development of laterality and bilateral motor abilities measured with respect to various rhythm movements in upper extremity of mentally retarded children. The development of laterality was measured by a survey of dominace-hand. The bilateral motor abilities were assessed by means of a tentative rhythm beat test of hands. One hundred sixty eight subjects with special education needs whose age ranged from 7 to 18 years old were used for an experimental group. Fifty nine normal children whose age ranged from 3 to 6 years old were also chosen as a control group. The major findings were as follows: (1) The development of lateral dominace-hand in mentally retarded children differed from that of normal subjects with an increase in chronological age; the degree of the attainment of lateral dominance-hand was 75 percent of the mean level of the normal children. Though normal children establish a dominace-hand by the age of 6 years old, mentally retarded children are likely to show 57 percent of normal development at the age of 7 through 9 years old and 65 percent of normal development at the age of 16 through 18 years old. (2) A greater delay in mentally retarded children was found through a rhythm test which was developed to assess bilateral motor abilities in upper extremity. A closer relationship between chronological age and the development of bilateral motor abilities in mentally retarded children was found. (3) In view of these findings, it was indicated that bilateral motor abilities of the retarded and non-retarded children were significantly correlated to the acqusition of dominace-hand.
横浜国立大学の論文
1985-10-30

精神発達遅滞児のLateralityの確立と上肢両側性運動

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