A method for locating a functional brain tissue by electrical stimulation includes performing electrical stimulations of different areas of the brain tissue to activate brain tissue regions identifying the functional brain tissue, recording an image or a video sequence of the brain tissue during and/or after a stimulation, comparing the recorded image or the video sequence with a reference image or a reference video sequence recorded without stimulation to determine a position of the brain tissue region that is activated by the stimulation. At least two stimulations of a plurality of electrical stimulations are performed, one directly after the other or simultaneously, and the recording of an image or a video sequence of the portion of brain tissue takes place during and/or after each performance of one of the at least two stimulations or during and/or after the simultaneous performance of the at least two stimulations.