Environmental toxicants, chemicals exhibiting with cholinotropics properties, and drugs – agonists and antagonists of M- and N-cholinergic receptors by acting on the developing brain of the fetus in the embryonic period of ontogenesis, cause a change the activity of the cholinergic mechanisms of the brain during critical periods of prenatal development with the subsequent disruption of the formation of different brain systems, primarily the ontogeny of nerve cells and brain neurotransmitter systems. These changes in the long term is correlated with neurobehavioral deficits from adult individuals, dysfunction of the reproductive system of adult offspring. The relevance of the study of prenatal effects of cholinergic factors on the central mechanisms of reproductive function, memory processes and learning during ontogenetic development of the organism due to the need of prevention and treatment of subsequent mental, behavioral, and sexual dysfunctions, and abnormal sexual behavior, infertility.
Prenatal exposure to N-cholinoblocker gangleron and in lesser degree to M-cholinoblocker metamisil leads to significant violations of the motivational component of sexual function in sexually mature offspring of males, expressed in low values of primary sexual activity, and increased latency of the approach and sexual dysfunction after the acquisition of sexual experience. Among the causes of sexual dysfunction in the offspring, it can be noted a change in the hormonal background in male rats, in the form of a significant decrease in the level of the main androgen testosterone, as well as damage in the dopaminergic systems of the brain, manifested by a decrease in dopamine levels.
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