Institute of Sport, Exercise and Active Living and School of Sport and Exercise Science, Victoria University, Footscray Park Campus, P.O. Box 14428, Melbourne, VIC 8001, Australia.
Res Dev Disabil. 2011 Mar-Apr;32(2):740-8. doi: 10.1016/j.ridd.2010.11.006. Epub 2010 Dec 4.
In addition to motor execution problems, children with hemiplegia have motor planning deficits, which may stem from poor motor imagery ability. This study aimed to provide a greater understanding of motor imagery ability in children with hemiplegia using the hand rotation task. Three groups of children, aged 8-12 years, participated: right hemiplegia (R-HEMI; N=21), left hemiplegia (L-HEMI; N=19) and comparisons (N=21). All groups conformed to biomechanical limitations of the task, supporting the use of motor imagery, and all showed the expected response-time trade-off for angle. The general slowing of responses in the HEMI groups did not reach significance compared to their peers. The L-HEMI group were less accurate than the comparison group while the R-HEMI group were more variable in their performance. These results appeared to be linked to functional level. Using the Vineland Adaptive Behavior Composite, children were classified as low or normal functioning - of the seven classified as low function, six were in the L-HEMI group. Accuracy was lower in the low function subgroup, but this failed to reach significance with an adjusted critical value. However, there was a strong correlation between function level and mean accuracy. This indicates that motor imagery performance may be more closely linked to function level than to the neural hemisphere that has been damaged in cases of congenital hemiplegia. Function level may be linked to the site or extent of neural damage or the level of cortical reorganisation experienced and more attention should be paid to neural factors in future research.
除了运动执行问题，偏瘫儿童还存在运动规划缺陷，这可能源于运动表象能力较差。本研究旨在通过手旋转任务，更深入地了解偏瘫儿童的运动表象能力。共有三组年龄在 8-12 岁的儿童参与：右侧偏瘫（R-HEMI；N=21）、左侧偏瘫（L-HEMI；N=19）和对照组（N=21）。所有组均符合任务的生物力学限制，支持运动表象的使用，并且所有组都表现出预期的角度响应时间权衡。与同龄人相比，HEMI 组的反应普遍较慢，但没有达到显著差异。与对照组相比，L-HEMI 组的准确性较低，而 R-HEMI 组的表现则更不稳定。这些结果似乎与功能水平有关。使用文兰适应行为综合量表，将儿童分为低功能或正常功能——七名低功能儿童中，有六名属于 L-HEMI 组。低功能亚组的准确性较低，但在调整临界值后，这一结果没有达到显著水平。然而，功能水平与平均准确性之间存在很强的相关性。这表明，运动表象表现可能与功能水平的关系比与先天性偏瘫中受损的神经半球更为密切。功能水平可能与神经损伤的部位或程度或经历的皮质重组水平有关，未来的研究应更多地关注神经因素。
