Vince M, Reader M, Tolhurst B
J Comp Physiol Psychol. 1976 Mar;90(3):221-30. doi: 10.1037/h0088035.
Effects of stimulation on the stereotyped and coordinated movements in the chick embryo were investigated using the type of stimulation (regular loud clicks) that is known to accelerate development and the time of hatching. The number of coordinated movements, the amount and approximate size of all activity, heart rates and, in 20-day embryos, respiration rates were assessed during a 15-min control period, a 15-min period of stimulation, and a 15-min period of no stimulation. The results showed an increase in the number of coordinated movements, but not their size, and some changes in the heart and respiration rates after the onset of stimulation. These effects occurred in most cases only after several minutes of delay. It is suggested that this delay may be connected with the reciprocal relationship between the coordinated movements and random motility in that the former may be triggered more readily at times when the latter are suppressed.
利用已知能加速发育和孵化时间的刺激类型（有规律的响亮滴答声），研究了刺激对鸡胚刻板且协调运动的影响。在15分钟的对照期、15分钟的刺激期和15分钟的无刺激期内，评估了协调运动的数量、所有活动的量和大致大小、心率，以及在20日龄胚胎中的呼吸频率。结果显示，刺激开始后，协调运动的数量增加，但大小未变，心脏和呼吸频率也有一些变化。这些影响在大多数情况下仅在延迟几分钟后才出现。有人认为，这种延迟可能与协调运动和随机运动之间的相互关系有关，因为前者可能在后者受到抑制时更容易被触发。
