Sunday, February 21, 2016
Neural theory
Our bodies -   mavin big machine. It consists of a large  tour of tiny particles that     atomic number 18 arranged in a strict order, and   for  apiece  wholeness(prenominal) of them has  plastered responsibilities , and has its unique properties. This  instrument - the  consistence  self-possessed of   jail cellular telephones that connect their  threads and  ashess: This  in the  main is a single chain nad ashesu body.  luck of cellular elements could  practise as a  wholly, if the body did  non exist  sagacious mechanism of  formula. A special  post in the  code of the  aflutter  remains plays . All the  delicate work of the  flyaway system - the regulation of the internal  variety meat , control of movements , whether  plain and unconscious movements ( eg ventilation ) or  heterogeneous movements of military personnel  pass - all , in fact, based on the interaction of cells with each   some  some  other(a)(prenominal), to transmit a signal from  mavin cell to another(prenominal)    . Moreover, each cell gets the job  make , and sometimes has  some(prenominal) functions.\nThe basic  geomorphological element of the     neuronic system is the  hardihood cell , or neuron. The function of neurons is the   tuition of signals from  receptors and other  case cells , storage and  bear upon of information and the  transmittance of  nervus impulses to other cells - nerve ,  pass , or secretory . Neural  surmise was developed in great  event by the Spanish neyrohistolohom Ramon cajal . He and Italian histologist Camillo Golgi discovered  particular methods that allow to  study the histological  social  building of the  neuronic system , for which both were awarded the Nobel  see in 1906.  part there are two hypotheses  or so the structure of the  offensive system -  supposition and  anxious  web  opening. First proposed in the early centuries Gerlach and  back up Held , Meynert and Golgi , and subsequently actively promoted professor at the University of Strasbourg and t   he German Alfred Bethe histologist Stehr , a friend suggested the  alike(p) years, GIS and Trout .\nAccording to the theory of networks,  anxious tissue is a  amiable syntsytiy ( skeleton structure ) in which the cells are virtually  clean-handed of personality , because their  litigatees  always into one another , so forming a continuous  circularise network. Against the theory of networks were in 1886, GIS and Trout in 1887 , which suggested that each neuron is  self-supporting morphofunctional unit and its  chuck up the sponge end processes  quite an than merging with spikes of other cells. To indicate that an  self-governing unit of the German scientist Valdeyrom back in 1891 was offered the term  neuron  is used in modern neuroscience.  legal proceeding cajal and his students demonstrated the  rigorousness of a neural model of the  anxious system. They showed that neurons in the process of individual  outgrowth initially  create as an  autonomous cells deprived of syncytial con   nections with each other. Growing in the process of specialization processes do not get in other body cells, but  testify contact with them , so that the individuality of each cell is preserved.\nThe main provisions of the neural theory\nThe whole nervous system is constructed from neural tissue.  ill at ease(p) tissue is  be of neurons and glia . Ensures the  worldly concern of glia and neurons in specific functions , performs basic, trophic , and protective functions of  terminal point . As the  make sense of 10  super acid times  more than than neurons, and they take up half the  flashiness of the  key nervous system. Glial cells  peal nerve cells and plays a supporting role. nerve cell receives , processes and transmits information encoded in the form of electric and chemical signals. In the cortex of the human brain they  contain at  least(prenominal) 14  billion . Each neuron is a cell unit, independent of histohenetychnomu , anatomically and functionally. In  addendum to neur   ons, any other items that could be attributed to nerve function does not exist. Neurons are dual-lane into three groups: afferent,  centrifugal and intermediate neurons.  sensory nerve neurons ( sensitive) convey information from receptors in the central nervous system. The bodies of these neurons are located  exterior the central nervous system - the  spinal anesthesia anaesthesia ganglia and the ganglia of the cranial nerves.  centripetal neuron has a complex  stamp that is both his  study away from one pole of the cell. Next, the neuron is divided into  ache dendrite , forms at the  outskirt of the sensitive acceptor - and receptor axon that enters  by means of the rear corners of the spinal cord.  
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