Afonso Veronica M, Bablekis Vasiliki, Pfaus James G
Center for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, 7141 Sherbrooke St. W., Montréal, QC, Canada H4B 1R6.
Physiol Behav. 2006 May 30;87(5):863-9. doi: 10.1016/j.physbeh.2006.01.006. Epub 2006 Feb 20.
Although previous research has shown that olfactory cues mediate female-male mounting (FMM) in the rat, the role of other sensory modalities on FMM has not been investigated. The present study examined the display of female mounting of castrated male rats in bilevel chambers following different tactile or locomotor activity manipulations. Female rats (N = 40) were ovariectomized (OVX), primed with estrogen (E) and progesterone (P), and given either vaginocervical stimulation (VCS), flank/perineum stimulation (FPS), combined VCS and FPS, or general handling, immediately before each test with a castrated male rat for five trials. Compared to handling, the FPS females showed an increase in FMM behavior, whereas females given VCS, or combined VCS and FPS, showed a decrease in FMM behavior. A second experiment examined the effect of a 15-min delay between stimulation and testing using identical experimental and control conditions. There were no significant differences in the amount of FMM behavior between these groups. Finally, OVX rats primed with E and P were tested with castrated males that had been given injections of a ketamine/xylazine anesthetic mixture, saline, or amphetamine, to induce three levels of conspecific locomotor activity: none, moderate, or high, respectively. A positive linear relationship was found between male activity level and FMM. These data indicate that both tactile cues and cues associated with locomotor activity of the stimulus male modulate FMM.
尽管先前的研究表明嗅觉线索介导大鼠的雌雄骑跨行为（FMM），但尚未研究其他感觉模态对FMM的作用。本研究考察了在不同触觉或运动活动操作后，去势雄性大鼠在双层实验箱中雌性骑跨行为的表现。雌性大鼠（N = 40）接受卵巢切除（OVX），用雌激素（E）和孕激素（P）预处理，并且在每次与去势雄性大鼠进行测试前立即给予阴道-宫颈刺激（VCS）、胁腹/会阴刺激（FPS）、VCS和FPS联合刺激或一般处理，共进行五次测试。与一般处理相比，接受FPS刺激的雌性大鼠FMM行为增加，而接受VCS刺激或VCS与FPS联合刺激的雌性大鼠FMM行为减少。第二个实验在相同的实验和对照条件下，考察了刺激与测试之间15分钟延迟的影响。这些组之间FMM行为的量没有显著差异。最后，用接受氯胺酮/赛拉嗪麻醉混合物、生理盐水或苯丙胺注射的去势雄性大鼠对用E和P预处理的OVX大鼠进行测试，以诱导三种水平的同种运动活动：分别为无、中等或高。发现雄性活动水平与FMM之间呈正线性关系。这些数据表明，触觉线索以及与刺激雄性的运动活动相关的线索均调节FMM。
