The brain is an electrical system – all of our thoughts (conscious or otherwise) are generated through a network of neurons, that send signals to each other with the help of electrical currents. This can be useful for quickly determining how brain activity can change in response to stimuli, and can also be useful for measuring abnormal activity, such as with epilepsy. It tells us, from the surface measurements, how active the brain is.
What is EEG?ĮEG (electroencephalography) measures the electrical activity of our brain via electrodes that are placed on the scalp. This needn’t be as gruesome as it sounds, as many brain imaging methods today are entirely noninvasive.īelow we will go through the most common brain imaging techniques – EEG, and (f)MRI, to see how they work, and how they compare, looking at the advantages and disadvantages of each. Understanding human thought and behavior can take many approaches, but to really understand how the brain works, you need to look inside it.
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