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Some companies already sell brain monitoring systems made of electrodes that measure external brain waves with a method called electroencephalography.
NeuroRex uses a wearable electrode cap that reads a person’s brain waves and turns them into commands like “Walk forward,” “Turn,” “Step back,” or “Stop.”
In one study, alpha binaural beats, or ones with a pulsing beat similar to that of “alpha” brain waves that are associated with a calm and relaxed state, helped some subjects do better in a creative task.
Do binaural beats benefit your brain?|Sara Kiley Watson|January 28, 2021|Popular-Science
With a cap full of EEG electrodes over their heads, they would proceed to have their brain waves recorded.
Besides, it was hard to understand what the brain waves really meant in terms of what the neurons in the brain were doing.