How portable EEG devices read your brain
Portable EEG devices record your brain activity in the same way as an EEG used in hospital settings, just with fewer electrodes and recoding from fewer areas of the brain. Neurons communicate via electrical impulses that can be picked up through the scalp by EEG. Thus, SOULINK zero, a portable EEG equipment, detects the electrical activity from part of the prefrontal cortex that is thought to be related to higher cognitive functions such as making a decision, thinking, executive functions, etc.