This func­tional three-struc­tur­ing of the en­doge­nous-auto­nomic sys­tem also shows it­self in a dif­fer­ent be­hav­ior of per­form­ance of the in­di­vid­ual rhyth­mic proc­esses
(il­lus­tra­tion 7).

Thus, the per­form­ance of the in­for­ma­tion sys­tem is ex­pres­sed in the glid­ing fre­quency changes of the ner­val ac­tion rhythm, where­by each fre­quency is in close cor­re­la­tion to level of ex­cite­ment of the nerv­ous ele­ments, and there­fore also to the in­ten­sity of the spe­cific en­vi­ron­men­tal ef­fects which hit them. With acous­tic stim­uli, the pitch is also il­lus­trated in the ner­val rhythm. Only un­der peace­ful con­di­tions and es­pe­cially dur­ing sleep, are the nerv­ous ele­ments, de­pen­dent on the depth of sleep, syn­chro­nized to tis­sue rhythms with fa­vored fre­quency bands (cf. the EEG-cri­te­ria for depth of sleep).