Sachs B D
Department of Psychology, University of Connecticut, Storrs 06269-1020, USA.
Physiol Behav. 1996 Sep;60(3):803-8. doi: 10.1016/0031-9384(96)00158-8.
Male rats have been observed to display erections when exposed to inaccessible estrous females, and it was suggested that these "noncontact erections" (NCEs) represent a species-typical response that may index sexual arousal. Initial efforts in other laboratories to repeat and extend this research were unsuccessful, and it appeared that differences in the rat strains being used might be responsible. To address this question NCE tests were given to rats of two albino strains, Wistar and Sprague-Dawley, and two pigmented strains, hooded Long-Evans and inbred Brown Norway. A high proportion of Long-Evans and Brown Norway rats displayed NCEs, whereas Wistar and Sprague-Dawley albino rats rarely did. Additional experiments did not reveal the reasons for the strain difference in NCE, but they provided evidence against hypotheses based on the relative erectogenic effect of albino and hooded estrous females, the attention paid to estrous females, the motor repertoire, or erectile function per se. Albinism-related neural pathology, possibly outside of the visual system, may contribute to the deficit in NCE in albino rats.
研究人员观察到，雄性大鼠在接触无法接近的发情期雌性大鼠时会出现勃起现象，有人认为这些“非接触性勃起”（NCEs）代表了一种物种典型反应，可能是性唤起的指标。其他实验室最初尝试重复并扩展这项研究，但未成功，似乎所用大鼠品系的差异可能是原因所在。为解决这个问题，对两种白化病品系（Wistar和Sprague-Dawley）以及两种有色品系（带帽Long-Evans和近交系棕色挪威大鼠）的大鼠进行了NCE测试。高比例的Long-Evans和棕色挪威大鼠表现出NCEs，而Wistar和Sprague-Dawley白化病大鼠很少出现这种情况。进一步的实验没有揭示NCE品系差异的原因，但它们提供了证据，反驳了基于白化病和带帽发情期雌性大鼠的相对勃起效应、对发情期雌性大鼠的关注、运动能力或勃起功能本身的假设。与白化病相关的神经病理学，可能在视觉系统之外，可能导致白化病大鼠NCE的缺陷。
