Albaret J-M, Chaix Y
université de Toulouse III, Toulouse cedex, France.
Neurophysiol Clin. 2012 Jan-Feb;42(1-2):11-7. doi: 10.1016/j.neucli.2011.07.001. Epub 2011 Aug 25.
Among psychomotor disorders in children, developmental coordination disorder (DCD) is characterized by a motor skill impairment that interferes with psychomotor development, academic performance and activities of daily living, despite normal intelligence. The main behavioural phenomena (lack of postural control, coordination and motor learning) suggest involvement of cerebellum, basal ganglia and frontal and parietal lobes. Our studies on a synchronisation/syncopation task, with EEG recording (coherence analysis and evoked potential), show that DCD children (8 to 12 years old) exhibit major interindividual variability and do not improve performance with repetition. In younger DCD children, an increase of coherence between fronto-central regions was reported, and, for evoked potential, an increase of motor preparation component and a N100 latency longer than control children. These findings support the idea of a general synchronization disorder in DCD children and furnish elements allowing a better understanding of intra- and interindividual variability.
在儿童精神运动障碍中，发育性协调障碍（DCD）的特征是运动技能受损，尽管智力正常，但这种障碍会干扰精神运动发育、学业成绩和日常生活活动。主要行为现象（缺乏姿势控制、协调性和运动学习能力）表明小脑、基底神经节以及额叶和顶叶均受到影响。我们对一项同步/切分任务进行了研究，并记录脑电图（相干分析和诱发电位），结果显示，DCD儿童（8至12岁）个体间差异较大，且重复任务并不能提高其表现。据报道，年龄较小的DCD儿童额中央区域之间的相干性增加，就诱发电位而言，其运动准备成分增加，且N100潜伏期比对照组儿童更长。这些发现支持了DCD儿童存在普遍同步障碍的观点，并为更好地理解个体内和个体间差异提供了依据。
