O'Brien Jane Clifford, Williams Harriet G, Bundy Anita, Lyons Jim, Mittal Amita
University of New England, Portland, ME 04103, USA.
J Mot Behav. 2008 Jan;40(1):43-61. doi: 10.3200/JMBR.40.1.43-61.
The authors examined potential mechanisms underlying motor coordination in children with developmental coordination disorder (DCD). Because children with DCD experience difficulty processing visual, auditory, and vibrotactile information, the authors explored patterns of choice reaction time (RT) in young (6-7 years) and older (9-10 years) children with and without DCD by using a compatibility-incompatibility paradigm and different sensory modalities. Young children responded more slowly than older children to visual, auditory, and vibrotactile stimuli. Children with DCD took longer than typical children to process visual and vibrotactile stimuli under more complex stimulus-response mappings. Young children with DCD responded more slowly than typical children to visual and vibrotactile information under incompatible conditions. Children with DCD responded faster than unaffected children to auditory stimuli. The results suggest that there is a developmental nature in the processing of visual and auditory input and imply that the vibrotactile sensory modality may be key to the motor coordination difficulties of children with DCD.
作者研究了发育性协调障碍（DCD）儿童运动协调背后的潜在机制。由于患有DCD的儿童在处理视觉、听觉和振动触觉信息方面存在困难，作者通过使用相容-不相容范式和不同的感觉模态，探索了患有和未患有DCD的年幼（6-7岁）和年长（9-10岁）儿童的选择反应时（RT）模式。年幼儿童对视觉、听觉和振动触觉刺激的反应比年长儿童更慢。在更复杂的刺激-反应映射下，患有DCD的儿童处理视觉和振动触觉刺激的时间比正常儿童更长。患有DCD的年幼儿童在不相容条件下对视觉和振动触觉信息的反应比正常儿童更慢。患有DCD的儿童对听觉刺激的反应比未受影响的儿童更快。结果表明，视觉和听觉输入的处理具有发育性质，并暗示振动触觉感觉模态可能是患有DCD儿童运动协调困难的关键。
