As in the Matrix The study participants had to make their way through 21 different mazes, with two choices, ie whether to move forward or down, based on what they felt through the visual stimulation of a phosphene (ie a visual phenomenon whereby the dots lights are perceived as spots or bars of light). To signal in which direction to move, the researchers generated a phosphene through transcranial magnetic stimulation https://www.wired.it/scienza/lab/2016/12/13/matrix-cervello-realta-virtuale/ \ https://www.methode-apprentissage.com/project/cerveau-phosphenes-et-memoire/ \ www.phosphenism.net