van Grunsven W, Njiokiktjien C, Vuylsteke-Wauters M, Vranken M
Institute for Remediation of Learning Disabilities, Eindhoven, The Netherlands.
Percept Mot Skills. 2009 Aug;109(1):3-29. doi: 10.2466/PMS.109.1.3-29.
Underlying sensorimotor factors, such as intermanual coupling, contributing to optimal laterality, long remain immature. Using the handmotor laterality blackboard, developmental change in symmetric bimanual motor function for 413 children in groups of 3 to 10 years of age shows synchronicity increased between groups 3 and 5 years of age; but between groups 5 and 7 years of age, given immature coupling, one hand may still disturb the movements of the other one. Between groups 7 and 9 years of age, the hands gradually stop disturbing each other and move independently and fluently. Changes in intermanual coupling with increasing unimanual independence represent expression of changing interhemispheric integration across groups. This promotes optimal laterality and task distribution between the hands. Maturation of the corpus callosum is inferred to be a factor in these ontogenetic changes which ultimately lead to optimal left hemisphere specialization for actions such as fluent writing.
诸如双手耦合等潜在的感觉运动因素，对最佳偏侧性的形成有影响，但长期以来一直不成熟。使用手部运动偏侧性黑板，对413名3至10岁儿童的对称双手运动功能发育变化进行研究，结果显示，3至5岁组之间的同步性增加；但在5至7岁组之间，由于耦合不成熟，一只手仍可能干扰另一只手的运动。在7至9岁组之间，双手逐渐不再相互干扰，能够独立且流畅地运动。随着单手独立性的增加，双手耦合的变化代表了不同组间半球间整合的变化。这促进了双手之间最佳的偏侧性和任务分配。胼胝体的成熟被推断是这些个体发育变化的一个因素，这些变化最终导致左半球在诸如流畅书写等动作上实现最佳特化。
