Influences of several kinds of anesthetic upon the brain wave of cats

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The following results were obtained concerning the brain wave of cats by the administration of several kinds of anesthetic. 1) By ether, chloroform, and morphine hydrochloride, the α wave decreased, the β wave appeared clearly, and the amplitude of the brain wave became small, resulting in the flat wave on the whole. In the case of chloroform, in addition, the slow wave with large amplitude came to appearance. 2) Phenobarbital brought about the slowing of the brain wave, together with the induced large amplitude. 3) The slow wave with large amplitude appeared and the α wave disappeared immediately after the injection of amytal and seconal. 4) Magnesium sulfate made the remarkable β wave appear and the amplitude small. 5) By paraldehyde the amplitude of the brain wave became small and the α wave disappeared, resulting in the flat wave. The effects upon the brain wave differed in phenobarbital, seconal, and amytal, and ether, chloroform, morphine, paraldehyde, and magnesium ions. Difference in the site of action of each drug should be responsible for this fact.
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