Our heroes are in Vogue

First on the opening Ludwig and Ziona responded anatomists. They rushed to find the nerve-depressant in different species of animals. It would be surprising if the nerve roots existed only in rabbits. In fact, it soon became clear that most mammals he for the most part length spliced with other nerves that are parallel, usually with wandering. However, almost always managed to find at least a small area where a shift nerve was separate from the vagus nerve. It was found that the nerve of the man, dog, cat, horse, rabbit, rabbit, sheep, hedgehog, mole, turtles, frogs, even in fish - all animals, which only studied Russian and Western anatomists. This gave the opening of Zion and Ludwig even more important: self-regulation of blood pressure, nervous, reflex self-regulation - has been inherent in all vertebrate animals, allowing to speak about the universal laws.
Full us investigation of the morphology of the nerve roots was held at the Kazan University, where he was renowned school of physiologists and morphologists. About Kazan school volumes have been written. Studies of Kazan University: confirmed everything that he had learned about the topography of "his" nerve Zion and Ludwig, and most importantly, showed how happen centripetal nerve impulses-depressant, leading to a reduction of excessively high blood pressure. So were first found the sensitive nerve endings-depressant (and no doubt other centrifugal nerves of the heart) - several types of heart receptors; located in the thickness of the heart muscle and its membranes. Kazan school found that a similar nerve exists not only in mammals, but also among reptiles, amphibians, and even fish. Thus, the nerve roots were evolutionarily ancient regulator of blood circulation.
Kazem-Bek, one of the prominent representatives of the Kazan school, wrote in his thesis that one of the branches depressant nerve is lost in the wall of the aorta arch and the other with heart branch nerve opposite side forms the interweaving between the aorta and pulmonary artery. A large part of fibers both nerves around right-to-left base of the lung artery and out on the front surface of the left ventricle, where branches between cardiac muscle and cover it with a thin layer of the epicardium. The other part of the fiber - mainly from the left heart branches - passes between the aorta and pulmonary artery and moves to the front surface of the right ventricle. To the naked eye their branches can be traced almost to the top of the heart.
Description nerves made Kazem-Bek, here is almost word for word, it only remains to add that the person tip is called the lower part of the heart , and the reason is the top, from which comes the aorta and the pulmonary artery and come to a large vein. What can you do, it just so happened since ancient times.
Much later, at the end of the first third of XX century, in the West appears article about pure aortic origin nerves-depressors, that is why the nerves of Zion became known, aortic, but where to go from abundance; works of Kazan school morphologists? And how to deal with morphological data Ziona and Ludwig?
Learn about the change of the name of nerve was not destined neither Ludwig (1816-1895), nor to Zion (1842-1912). Quarrelsome and hot-tempered, Ilya Fabian Gottlieb was not slow to open the fierce discussion in the protection of their data. In fact he had to participate in another, more important debate, which today is not necessary to speak in the past tense: she continues. With the advantage of Zion. He failed to win by knockout, but his odds by points is increasing.
The fact that after the opening of Zion and Ludwig many physiologists interested in the nerve-depressant and his irritation. It soon became clear that this nerve, like wandering, belongs to the family of two-faced: in some cases, his irritation was lowered blood pressure, while others clearly increased. Knowledge of the then physiology not allowed to explain this phenomenon. Suggested that in the nerves there are some other structure that these nerves contain not only "from time immemorial, inherent to the nature of" brake nerve fibers, but some admixture of neurons opposite effect, causing a "stimulating" effect. It looked plausible, especially since nobody in the world knew how to distinguish between excitatory neurons from braking. We will not enumerate the supporters of this idea - their name is Legion, and then say, no one in those days could not offer anything in return.