The aim or the study was to present a practical application of electioencephalographic techniques tic essential aspects of EEG in sheep and its usefulness in the analysis ()I changes in the CNS. are demonstrated in the paper The experiments were conducted on 10 ewes. hybrids of the Polish Merino,selected especially for laboratory purposes There is no 60 standard pattern in encephalogi:rphic methods in am mats that's why the authors made a registration ot the induced biopotentials in sheep from the experimentally c hose)) points of the animals head It was presented during the experiment that the cerebral cortex is characterized by a high dynamism index which was proved during the expel intents on CNS ieactions to the I actoi s such as hungel. sonic emission or control xylazine influence The ceiebral cortex of sheep in a vesting conditions reveals a bioelectric activity of a mean amplitude ot 30 pV and ii frequency of 25 HA, which confirms existence of a beta rhythm An application of a sonic stimulus enables the stimulation ()I the central nervous system of sheep, which is confirmed by an inci eased mean amplitude lot 23%) and a t requency (of 21%) of the cerebral cortex activity, and also by the electroencephalogram Results obtained prove that the region of the mesencephalon is charactel ised by the shortest umc 01 reaction to the muoduced stimulus. and the mean time of response is 0 56 seconds ( 0 005 s) Ile ways of the most suitable piactices as well as the chances for unification of EEG method were discussed