Electroencephalogram of Cats Subjected to Repeated Minimal Convulsive Doses of Electricity

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Abstract
Electroencephalographic studies were carried out in a series of 12 adult cats subjected to minimal convulsive doses of electricity, repeated at approx. 5 min. intervals. Of the 12 cats employed, 7 succumbed and 5 survived. It was observed that the 8-10/sec. medium voltage rhythm of the normal relaxed cat and the 14-21/sec. medium voltage rhythm of the normal tense cat were gradually and successively replaced by decreased frequency, lowering of voltage, continuous slow high voltage waves, fixed low voltage, temporary 9/ sec. (but still low voltage) waves and decreasing voltage to zero as death approaches. In the cat surviving as many as 95 convulsions, the recovery of the altered electroencephalogram occurred 21 days after the last convulsion.

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