The olfactory analyzer The first and second alarm systems 4. Are mainly function of a bark of the big hemispheres. Other representation about the mechanism of formation of time communication is конвергентная the theory. In its basis ability нейронов lies to answer irritations of different modalities. On P.K.Anokhin's representations, conditional and unconditional irritants cause widespread activation корковых нейронов thanks to inclusion ретикулярной formations. As a result ascending signals (conditional and unconditional irritants) are blocked, i.e. there is a meeting of these возбуждений on однихи the same корковых нейронах. As a result of convergence возбуждений arise and time communications between корковыми representations of conditional and unconditional irritants are stabilised.