Fishkind M, Haley S M
Phys Ther. 1986 Oct;66(10):1509-14. doi: 10.1093/ptj/66.10.1509.
The purpose of this preliminary study was to examine the relationship between the emergence of independent sitting ability and the presence of underlying motor components (reflexes, automatic postural reactions, and flexion and extension movement patterns). Ten full-term, nonhandicapped infants were tested longitudinally for the presence of underlying motor components as they attained three performance levels of sitting ability between the ages of 4 and 7 months. A total of 26 observations was collected across the 10 infants. The time of each testing session was based on the infants' attainment of each successive sitting performance level. Underlying motor components were assessed at each testing session to determine whether a consistent sequence of component emergence developed and whether those components were associated with a specific performance level of sitting. The results indicated that no consistent sequential pattern of motor component emergence existed. The data showed that the pattern of underlying component emergence was highly variable across the infants at similar levels of sitting ability, although some components were associated highly with specific performance levels. The data suggest that the attainment of independent sitting in nonhandicapped infants is described best as a continuous developmental process, rather than a discontinuous "stage" phenomenon.
这项初步研究的目的是检验独立坐立能力的出现与潜在运动成分（反射、自动姿势反应以及屈伸运动模式）之间的关系。对10名足月、无残疾的婴儿进行了纵向测试，在他们4至7个月大达到三种坐立能力表现水平时，检测其潜在运动成分的存在情况。对这10名婴儿总共进行了26次观察。每次测试的时间基于婴儿达到的每个连续坐立表现水平。在每次测试时评估潜在运动成分，以确定是否形成了成分出现的一致顺序，以及这些成分是否与特定的坐立表现水平相关。结果表明，不存在运动成分出现的一致顺序模式。数据显示，在坐立能力水平相似的婴儿中，潜在成分出现的模式差异很大，尽管有些成分与特定表现水平高度相关。数据表明，无残疾婴儿独立坐立能力的获得最好被描述为一个连续的发育过程，而不是不连续的“阶段”现象。
