Evoked potentials (EP)

When mea­su­ring evo­ked poten­ti­als (EP), bio­elec­tri­cal acti­vi­ties of the brain are regis­tered that ari­se in respon­se to cer­tain exter­nal sti­mu­li (visu­al, acou­stic, sen­so­ry). The­se exami­na­ti­ons are valuable for detec­ting dis­tur­ban­ces in the pathway sys­tems invol­ved in the trans­mis­si­on of the­se exter­nal sti­mu­li.

In order to mea­su­re the poten­ti­als, elec­tro­des are atta­ched to the pati­en­t’s head, which mea­su­re the brain waves. Spe­ci­fic visu­al, acou­stic or sen­so­ry poten­ti­als lead to a mini­mal chan­ge in brain­wa­ve acti­vi­ty in cer­tain are­as of the brain. As a result, con­duc­tion and pro­ces­sing dis­or­ders can be reco­gni­zed by the form and tem­po­ral occur­rence of the­se sti­mu­lus respon­ses.