[Value of electroencephalography in veterinary medicine. Methods of electroencephalographic recording in cattle]

No significant differences were found to exist between the potentials of the two cerebral hemispheres in clinically intact cattle. Six Frisians were tested, and frequencies obtained from scalp recording were not significantly higher than those recorded from the Lamina interna. The average rise was 1.21 Hertz or 4.06 per cent on the basis of 29.79 Hertz mean frequency. The amplitudes, however, declined on average by 4.36 microvolt per wave, that is by 18.4 per cent. These changes were significant in 50 per cent of the probands. The technique of recording cerebral potentials from the scalp of cattle appears to good information in the context of cortical rhythms. Faulty recording may cause amplitude variation, with different amplitude heights in different animals. The technique of scalp recording has proved applicable to a wide variety of examinations.