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| Research article summary (published 30 Dec 2002): |
Normal development of bimanual coordination: visuomotor and interhemispheric contributions.
Full Abstract
The corpus callosum is one of the last cortical pathways to develop, continuing to myelinate through the end of the first decade of life. However, the functional consequences of this late development are not entirely known. The importance of callosal development for bimanual motor coordination is suggested by the fact that bimanual coordination in younger children is similar to that of persons with commissurotomy or callosal agenesis. This study focused on the development of bimanual coordination in 67 normally developing children between 6 and 15 years of age using the computerized Bimanual Coordination Test (cBCT). Results indicated that right- and left-hand unimanual motor speed was significantly correlated with age (r = -.26 and -.44, respectively). Age was also significantly associated with accuracy of performance on trials demanding both symmetric (r = -.46) and asymmetric (r = -.50) bi-manual responding. The correlation with asymmetric bimanual responding (requiring greater interhand coordination) remained significant when covarying performance on symmetric response trials. Accuracy on asymmetric bimanual trials requiring greater left- than right-hand speed accounted for the largest portion of this unique, age-related variance. Thus, cBCT performance reveals child development in motor speed and visuomotor processing, as well as the unique contributions of interhemispheric interactions to bimanually coordinated motor activity.
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Author information
Author/s: Marion, Sarah DeBoard (SD); Kilian, Shirley C (SC); Naramor, Terri L (TL); Brown, Warren S (WS);
Affiliation: Travis Research Institute, Fuller Graduate School of Psychology, Pasadena, California 91101, USA.
Journal and publication information
Publication Type: Comparative Study; Journal Article
Journal: Developmental neuropsychology (Dev Neuropsychol), published in United States. (Language: eng)
Reference: 2003-; vol 23 (issue 3) : pp 399-421
Dates: Created 2003/05/12; Completed 2003/07/31; Revised 2006/11/15;
PMID: 12740193, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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