ELECTROENCEPHALOGRAPHIC OBSERVATIONS IN BUFFALO CALVES WITH EXPERIMENTAL POLIOENCEPHALOMALACIA

Electroencephalographic changes following amprolium-induced polioencep halomalacia in five buffalo calves were stud led. Abnormalities of the electroencephalograms included a decrease in frequency patterns, occa sional spindles and decreased voltage patterns during the onset of cli nical signs. This was followed by abnormal slow waves and a high volta ge-low frequency pattern of severity signs. In the comatose stage ther e was little evidence of electrical activity. Electroencephalograms of the three animals treated with thiamine HCl showed normal awake patte rns (beta-rhythm).