DEVELOPMENTAL COORDINATION DISORDER AND DYSGRAPHIA:A CASE STUDY
发展性协调障碍与书写困难个案研究

This study examined the cognition and motor skills in a 14-year-old boy with s evere writing difficulties. This case, zl wrote very slowly, his handwriting was bad and hard to be recognized. The study showed that his intelligence, reading comprehension and listening comprehension were normal. There were no differences between zl's performance on accuracy of naming single characters, two-characte r words, numbers, and objects with that of same-aged controls. But his speed wa s significantly slower than that of the controls. This study focused on zl's fin e motor, visual-spatial, visual, and sequential processing skills. The results showed that his visual memory, sequential processing abitities and motion detect ion was normal. His motor skill, and visual-spatial were significantly worse th an those of the controls. Neurophysiology examination found that his brain wave was abnormal, MRI scans indicated that myelinated corpus callosum and cerebellum developed abnormally. These findings suggested that zl's writing difficulti es reflected his general motor coordination disorders , and had neurophysiolo gic foundations. The implications for cognitive neurology mechanism and early di agnosis of writing difficulties were discussed.