Shapiro B K, Accardo P J, Capute A J
Dev Med Child Neurol. 1979 Jun;21(3):369-73. doi: 10.1111/j.1469-8749.1979.tb01629.x.
A total of 127 children with profound mental retardation were reviewed to determine the age at which walking began. 53 per cent of the children walked at a median age of 30 months. Further sub-classification revealed that both the number of ambulatory children and their age at walking varied with degree of neurological handicap, children with additional neurological problems having a higher median age for beginning to walk. The minimal cognitive level required for walking remains unknown, but is probably less than generally accepted. In this profoundly retarded population, the existence of neurological factors was associated with both increased age at walking and with decreased ability to walk.
对127名重度智力发育迟缓儿童进行了回顾性研究，以确定其开始行走的年龄。53%的儿童在30个月的中位年龄开始行走。进一步细分显示，能行走儿童的数量及其开始行走的年龄均随神经功能障碍程度而变化，伴有其他神经问题的儿童开始行走的中位年龄更高。行走所需的最低认知水平尚不清楚，但可能低于普遍认知。在这个重度发育迟缓人群中，神经因素的存在与开始行走的年龄增加以及行走能力下降均有关。
