On the location of the motor centers of the cerebral cortex in a person according to the results of irritation by their faradic current during cerebral operations

The question of the location of the motor centers of the cerebral cortex in a human until late time can be clarified only on the basis of the observation with the destruction of certain parts of the motor areas and those cases in which the pathological nest served as a source of irritation and led to local seizures. Valuable as these observations are, they did not often make it possible to find out with such strict accuracy the position and boundaries of the motor centers of the cortex in humans, as they make it possible to perform experiments on animals. Only in a later time, along with the development of brain surgery, during the production of Horsley's operations in cases of epilepsy, did it become possible to study the motor centers of the human cerebral cortex with the help of an electric current, that is, in the same way as we do it animals.