动物实验 z-bo 2020-08-31 374

　　A new study shows that pain seems to prevent female mice from continuing to mate, but it does not prevent male mice from mating.

　　In this study, female mice feel pain when mating and are unwilling, but males want to mate even when they are suffering. The researchers said the reason may be because male and female mice face different evolutionary pressures. They say that similar creatures, rather than culture, may play a role in machinery. Babies [female rats] may want to, or at least genetically want them, and make sure they are in good condition, because childbirth increases the costs associated with the baby. The author of the study and Geoffrey Mogill of McGill University in Canada said: “They gave birth and were taken care of. Mogill said that this pain may be a signal for a female mouse: “They may not be completely healthy. Children may not be a good idea. "

　　"However, in men, as long as you release your sperm, your job is complete." Then, the man's health will not be affected, Mogill said in the "Life Science" magazine. [Animal mating: 7 stories of wild animals' mischievous behavior]

　　To test the motives of mating mice, the researchers placed male and female mice in the mating room, and placed the females and females in a barrier that includes a door. The isolation door is so small that it cannot be pushed open. However, as long as women are willing, women are enough to break the barriers to men. In this way, researchers can confirm that the mating behavior that occurs is triggered by the female. The male researchers also tested the male's motivation for mating and placed it in an inseparable room where the male mice could contact the female mice indefinitely. Inject male and female mice with chemicals that cause inflammatory pain in the genitals and other parts of the body (hind legs, tail, cheeks, etc.) to test sexual desire. When the researchers injected painkillers or libido enhancers into female mice, the negative effects of pain on female libido were reversed. The researchers pointed out that this finding may provide clues for the formation of female sexual impulses. Although some people believe that women's sexual desire (or lack) is mainly controlled by cultural expectations, this study shows that certain mechanisms of sexual behavior are derived from biology. display. Mogil said that this research also helps clarify certain human health issues. He said that in humans, loss of libido often occurs in patients with chronic pain, but this animal study helps to better understand what this is. Two drugs used as libido enhancers in mice were also tested, apomorphine and melatonin II, and it was found that it can increase libido only when the mice are in pain. Mogil said: "Therefore, we think this may help develop potential libido enhancers in the future."