Naggar A N, Toner J P, Adler N T
Physiol Behav. 1980 Jun;24(6):1041-5. doi: 10.1016/0031-9384(80)90044-x.
This paper describes a "stretching response" which occurs in some female laboratory rats during the course of mating. It is most obviously characterized by an indentation of the abdominal wall and tonic limb and pelvic movements, which occur in irregularly spaced pulses of variable duration. The response was not seen in 10 rats in which intromissions had been prevented by a vaginal mask. In contrast, stretching was displayed by 9 of 10 non-masked subjects. This indicates that vagino-cervical stimulation is necessary for the induction of the stretching response. Vagino-cervical stimulation delivered by a plunger assembly was found to be sufficient to induce the response in 9 of 10 rats. Temporal summation of this stimulation was seen and ovarian hormones were found to increase the amount of stretching. Hypotheses concerning causes and effects of the stretching response are presented.
本文描述了一些雌性实验大鼠在交配过程中出现的一种“伸展反应”。其最明显的特征是腹壁凹陷以及四肢和骨盆的强直性运动，这些运动以持续时间可变、间隔不规则的脉冲形式出现。在10只通过阴道罩阻止插入的大鼠中未观察到这种反应。相比之下，10只未戴罩的实验对象中有9只表现出伸展反应。这表明阴道 - 宫颈刺激是诱导伸展反应所必需的。发现通过一个柱塞组件进行的阴道 - 宫颈刺激足以在10只大鼠中的9只中诱导出该反应。观察到了这种刺激的时间总和，并且发现卵巢激素会增加伸展的程度。文中还提出了关于伸展反应因果关系的假设。
