J.Jpn. Surg. Soc.. 56(7): 893-902, 1955

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THE EFFECTS OF ABLATION OF THE CEREBRAL CORTEX FOR THE EPILEPTIC CONVULSION IN DOGS 2. THE EFFECTS OF ABLATION OF THE BILATERALL CEREBRAL CORTEX

The cerebral cortex of dogs including the motor area in various extent have been removed. After the Iong termed observation of these dogs, the residual cerebral cortex is stimulated by the electric and chemical means. The results are as follows:
1. If the contralateral face area is removed during the conpensatory period after the ablation of unilateral cortical motor area the convulsion still can be produced by the stimulation of ipsilateral remaining cortex.
2. On the contray, in this case, the convulsion does not occur if the coutralateral motor area is removed. But after the lapse of six to eleven weeks more, the convulaion can be produced again by the same stimulation.
3. If the bilateral motor areas are simultaneously removed, then the convulsion does not occur by stimulations of the bilateral remaining cortexes. But after eight to eIeven weeks lapse, the convulsion can be produced by the same stimulation.
4. The convulsion of extremities does not occur by the stimulation of bilateral remaining cortexes, if the contralateral motor and face areas are removed during the conpensatory period after the ablation of unilateral motor and face areas. But after more than eleven weeks elapse, then the convulsion again can be produed by the same stimulation.
(author's abstract)

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