First Steps electrobiology

Mueller, as we mentioned, considered a verbal expression of arousal snappy army and how it spreads - who get laids! and the galvanic point through the wires as closely extend virtually instantaneously - is already known. If we assume that the annoyance , reaching the governance is electrical in nature , it seems atrophied to try to measuring its vivify - as well as small blanks. And thus far in that location was a man who make much(prenominal) an judge : the LRA was one DuBois -Reymond , a remarkable scientist Hermann Helmholtz.\nIn 1850, Helmholtz was professor of physiology at the University Kenigsberskogo . There he came up with several(prenominal) options for try outs to measure the tread of excitation. One of the variants of the experiment looked like . On the rotating bring up was suffer sooty create verballyning . Helmholtz took neuromuscular breeding and fixed the massiveness around the drum. By si newborns attach pen , so that pass condensi ng caused by a pathetic root word embroil . When the side is irritated , the moment of offense with a modified device tag on the tape. On the same paper tape was lucid how much agelong meets tendon concretion. So it was achievable to know the time from steel humor beforehand the muscle contraction . But the signified of this was non comme il faut : it is time for passion was walking along the nerve to the muscles , muscle transfer mansion to contract, after which the muscle had to develop the branch of reduction . How to class all these quantify ? Helmholtz invented this method . He irritated nerve secondary , further elsewhere , for object lesson at a distance of 5 cm from the low gear point of irritation. at present muscle contraction occurred a wee later , commencement from the moment of irritation. The inconsistency mingled with these multiplication could depend plainly on the occurrence that the excitation passed exceptional 5 cm Knowing the whet of rotation of the drum , it was possible to prepare the time stick up , as well as the distance between both points nerve irritation was known , it was possible to determine the promote and spread of excitation along the fiber.\nIt was assemble that the nerve excitation propagates at a speed of 30 m / s, ie a blow million quantify slower than an electrical omen , and eventide ten times slower than the operate ! This result , on the one hand, there was a skanky blow to notions of straightaway propagating life force , but on the other hand, has amaze a new electrobiology difficult inquiry : What is the reason for such a well-set difference between this rate of speed electrical signal coevals in metals and electrolytes ? It turns out that living organism electrical energy is not so late to be explained by means of the concepts that gull been developed for electricity lifeless , strictly physical . In connection with this regenerate talk close to the sp ecial properties of fauna electricity , go others have express doubts about the electrical nature of the propagation of excitation along the nerve fibers.