You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is the parasympathetic nerves that produce uterine inhibition and vasodilatation of uterine vessels are arise from which segments of the veebrae ? and explain in detail?
Sympathetic nerves from T12, LI segment of spinal cord produce uterine contraction and vasoconstriction. The parasympathetic nerves (S2, S3, S4) produce uterine inhibition and vasodilatation. However, these effects are complicated by the pronounced effects of hormones on the genital tract. Pain sensation from the body of the uterus pass along the sympathetic nerves, and from the cervix, along the parasympathetic nerves. Ref : B D Chaurasia's Human Anatomy , sventh edition , volume 2 , pg.no., 422,423.