Answer:
In 1870, Gustav Fritsch and Eduard Hitzig discovered that applying a light electrical current to a dog's cortex caused the dog to move different parts of the body.
Step-by-step explanation:
German physiologists Gustav Fritsch and Eduard Hitzig in 1870 electrically stimulated small parts of a dog's brain and observed that this stimulus produced some movement in the animal's body. This discovery led neuroanatomists to a more detailed analysis of cerebral cortex and its cellular organization.