On the March of the Cerebellar Epi­leptic Convlsion in Dogs

1) Cerebellar convulsion was identical with the cerebral cortical epileptic convulsion and the number of cases in which the march of spasm was observed were quite the same as that of cases in which convulsion occurred at the same time on the whole body. 2) No convulsion occurred by stimulation of the vermis cerebellaris and also convulsions occurred very rarely by that of the cerebellar nuclei. 3) In cases having the march of spasm caused by stimulation of the lobus lunatus anterior, spasm began in the fore limb, while by stimulation of the lobus lunatus inferior and lobus semilunaris spasm started mainly in the hind limb on the side of stimulation. 4) In the case of stimulation of cerebellum, the pathway of the impulse to the opposite side was considered to be the communication between both cerebellar hemispheres and both thalami and thus the march of spasm spread from one side of the body to the other side. 5) No march of cerebellar epileptic convulsion occurred without the cerebral motor cortex. 6) After the removal of both sides of the cerebral motor cortex no march occurred, but the general convulsion occurred. 7) No convulsion occurred by stimulation of the cerebellar hemisphere after the removal of both thalami or both nuclei lenticulares. 8) The march of convulsion occurs by close cooperation of the pyramidal and extrapyramidal tracts. It seems that for the impulse of the convulsion the extrapyramidal tract plays an important role, while for the start of the convulsion, that is, march of spasm pyramidal tract plays the main role.