Unconditioned reflexes Rights: Classification and phylogenetic characterization

Under unconditioned reflexes means the combination of behavioral characteristics of a person with whom he is born.They do not require training and development, and vary slightly with age, being dominant in everything that does or how to lead a particular individual.This complex set of unconditioned reflexes called instinct - a form of human activity, which ensures the preservation of the species, the implementation of self-preservation and feeding behavior.

Classification unconditioned reflexes divides them into specific types, in the combined group.Among them are simple and visceral tendon reflexes.It refers to a complex defense, food, sex.Because the term "unconditional" includes sexual, feeding behavior, and self-preservation, as well as grasping reflex, holding your breath, reflexes propriochuvstvitelnosti system, and cough.Among the simple presence of multiple reflections notes sold by segmental apparatus of the spinal cord, the meaning of which refers to vegetative reactions and unconscious behavior.

birth of a child is accompanied by a number of entire specific conditions by which the birth and stay in the neonatal period are partially protected from the external environment provided that the mother, as it provides a close contact with it.The most notable unconditioned reflexes - a search engine, food, grasping.During life, they, in addition to food, some fade away and are replaced by conventional form, that is, those that require a stimulus for their development.For example, if you put the baby immediately after birth in the mother's abdomen, he instinctively starts to search the nipple, although this time he is not hungry, and feeding is not a priority of employment as for the mother and for the baby.At the same time such a technique is used in obstetrics to link mother-child that later helps feeding and lactation.Also, the child tries to catch the scent of the mother, so that virtually none of the other women can not breast feed him.

Another noteworthy reflex with which the person is born, is an opportunity to hold their breath at the moment of contact of the head with water.The fruit of the womb is constantly surrounded by fluid and spontaneous breathing due to lung development in the last trimester is impossible.In addition, the child does not feel hypoxic and hypercapnic stimuli, and alveolar surfactant is present, which reveals them.Because in an aqueous environment these unconditioned reflexes, even though their presence does not appear, and after the birth of a baby are able to hold their breath while swimming.

Despite the fact that the sexual instinct and survival - is innate reflexes of the person, their expression impossible at an early age.Here the situation is quite the opposite feeding behavior, because in the period from 1 to 4, although this period is strictly individual, self-preservation instinct yields to the desire to explore the surroundings, and the sexual reflex does not develop, because there is no data in the central nervous system about the opposite sex.

grasping unconditioned reflexes person appear even in the fetus, as evidenced by its presence in experiments in premature babies, who were due to caesarean section.This reflex behavioral response is likely to be followed by phylogenetic, the remainder of the previous kinds of organisms.It manifests itself in the form of bending the fingers and squeeze irritating palmar surface of the object.At a time when people did not live in a civilized world, these unconditioned reflexes help to fix the baby to the mother's neck and held her hands.Grip strength, even when the newborn is sufficient to withstand the weight of its own: putting a finger in the palm of a child can simply pick it up.