The acoustic analyzer This kind of braking of conditioned reflexes arises at once in reply to action of an extraneous irritant, i.e. is the congenital, unconditional form of braking. Unconditional braking can be external and other-wordly. External braking arises under the influence of the new irritant creating the prepotent centre of excitation, forming a rough reflex. Biological value of external braking consists that, затормаживая current conditioned-reflex activity, it allows to switch an organism to definition of the importance and degree of danger of new influence. The extraneous irritant, making braking impact of a pas a current of conditioned reflexes, is called as an external brake. At repeated repetition of an extraneous irritant the caused rough reflex gradually decreases, and then disappears and any more does not cause braking of conditioned reflexes. Such external braking irritant is called as a dying away brake. If the extraneous irritant contains biologically important information it every time causes braking of conditioned reflexes. Such constant irritant is called as a constant brake. 3.кишечную. All вестибулорецепторы concern to вторичночувствующим and share on two types: cages of the first type have колбообразную the form, the second type - cylindrical. On the free surface of a cage have hairs, from them thin (60-80 on each cage) are called стереоцилиями, and one thick and long is on periphery of a bunch and is called киноцилием. At change of position of a head and a body in space there is a moving желеобразной weights which rejects the eyelashes shipped in it. Their moving serves as adequate stimulus for excitation of receptors. Displacement of hairs aside киноцилия causes exciting effect, in opposite - тормозный.