By applying mild electrical stimulation to parts of an animal's cortex, gustav fritsch and eduard hitzig triggered body movements. they discovered what is now called the ) motor cortex. b) visual cortex. c) auditory cortex. d) somatosensory cortex.

Motor Cortex

Explanation:

The motor cortex is principal part of the brain that involves motor (motion) functions. The motor cortex's function involves planning, deciding, and executing physical movements.

In 1870 Gustav Fritsch and Edvard Hitzig showed that electrical stimulation of the cerebral cortex of a dog produced movements involuntarily.

This experiment was a crucial event in the development of modern neuroscience.

It became an experimental evidence for cerebral cortex involvement in motor function, the electrical excitability of the cortex, the topographic representation in the brain, and the localization of function in different regions of the cerebral cortex.