Sherick I, Greenman G, Legg C
Child Psychiatry Hum Dev. 1976 Spring;6(3):170-83. doi: 10.1007/BF01435498.
With the waning of the tonic neck reflex beginning with the 8th to 12th week, and disappearing, in most instances, by the 16th week, the infant begins to become bilateral and makes symmetrical movements and engages his hands in the midline usually over the chest while in a supine position. The developmental significance of such behavior is considered--for example, its participation in the emerging sense of self and its role in the consolidation of emerging ego skills. Consideration is given to the possible implications of faulty midline behavior for development, and to whether failure to engage in an optimal amount of midline behavior, in interaction with other factors, can be used to alert observers to possible future developmental disturbances.
随着强直性颈部反射在第8至12周开始减弱，并在大多数情况下在第16周消失，婴儿开始变得双侧对称，并做出对称动作，通常在仰卧位时将双手放在胸部中线位置。人们会考虑这种行为的发展意义——例如，它在新兴自我意识中的参与以及在巩固新兴自我技能中的作用。人们会考虑中线行为缺陷对发育的可能影响，以及与其他因素相互作用时，未能进行最佳量的中线行为是否可用于提醒观察者注意未来可能出现的发育障碍。
