"An Electroencephalogram (EEG) is a clinical tool to monitor the electrical activity of our brains. Put very simply, our minds are constantly moving ions around, and when they reach the scalp, it's possible to measure those ions. By placing electrodes on the scalp, you can record the changes in voltages pushed out by our brains more or less in real time. These voltages are commonly grouped into categories, which are often described as brain waves."
"He explained that these technologies can be used to diagnose issues both in the structure and function of the brain. And while there are many technologies which can look at how our brains work, "we're a long way away from understanding the brain like we understand the heart." Broadly speaking, EEGs are a fairly simple tool for looking at how our minds work, but they have one benefit over more complex methods such as fMRI (functional Magnetic Resonance Imaging), since they work in real time."
Consumer EEG headsets are increasingly appearing at tech shows as more companies enter the space. EEG records electrical brain activity with scalp electrodes, capturing voltage changes from ionic movements in real time. Voltages group into brain waves: Gamma (hard thinking), Beta (anxious), Alpha (relaxed), Theta (creative or dreaming), Delta (asleep). Experts say EEG can help diagnose structural and functional issues and offers temporal advantages over fMRI, yet brain understanding remains limited compared with the heart. Consumer EEG products have existed for years and may mirror heart-monitoring wearables' uptake, but clear evidence of benefits and limits remains necessary.
Read at Engadget
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