Brown J V, Fredrickson W T
Dev Psychobiol. 1977 Nov;10(6):489-98. doi: 10.1002/dev.420100602.
The relationship between grasping and sucking, a possible precursor of hand-mouth coordination, was examined in human newborns of varying gestational ages. Grasping was elicited by rapidly tilting the infant backwards while he rested on a padded board and held a grasp bar. Infants were tilted 4 times under each of 3 conditions: grasping, sucking, and grasping-while-sucking. The dependent variables were strength and duration of grasp and frequency and amplitude of sucks during the 15 sec following the tilt. The results indicated that grasping did not affect sucking but that sucking increased the strength and the duration of the grasp. Furthermore, either response system was more highly correlated with indices of maturity of the central nervous system when elicited in the presence rather than the absence of the other. We conclude that in human newborns sucking may be dominant over grasping but that both are part of an integrated system which may form the basis for the development of hand-mouth coordination.
在不同胎龄的人类新生儿中，研究了抓握与吸吮（手口协调的一种可能先兆）之间的关系。当婴儿躺在软垫板上并握住抓握杆时，通过迅速将其向后倾斜来引发抓握动作。在三种条件下，每种条件下将婴儿倾斜4次：抓握、吸吮、边吸吮边抓握。因变量为倾斜后15秒内抓握的力量和持续时间以及吸吮的频率和幅度。结果表明，抓握不影响吸吮，但吸吮会增加抓握的力量和持续时间。此外，当两种反应系统同时出现而非单独出现时，它们与中枢神经系统成熟指标的相关性更高。我们得出结论，在人类新生儿中，吸吮可能比抓握占主导地位，但两者都是一个综合系统的一部分，该系统可能构成手口协调发展的基础。
