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Difference between EEG and MRI

Difference between EEG and MRI

There are many different medical tests that can be used to diagnose and treat different conditions. Two of the most commonly used tests are EEGs and MRIs. While both have their benefits, they also have some key differences. Here we will take a look at what those differences are, and when each test might be most appropriate.

What is EEG?

EEG is short for electroencephalography. It’s a method to record the electrical brain activity that’s happening on the surface of your skull. EEG is noninvasive, meaning it doesn’t involve surgery. All you have to do is sit still with sensors attached to your scalp. The sensors detect tiny electrical charges that your brain cells produce when they’re active. This activity shows up as wavy lines on an EEG recording. EEG is used to help diagnose conditions that involve abnormal brain activity, such as seizures. EEG can also be used to sleep or monitor coma patients or check for brain death. The test is painless and taking an EEG only takes a few minutes to an hour.

What is MRI?

MRI, or magnetic resonance imaging, is a type of scan that produces high-quality images of the inside of the body. MRI uses a powerful magnetic field and radio waves to produce these images. MRI is a painless and safe procedure that is used to diagnose a wide variety of conditions. MRI can be used to examine the brain, spine, organs, and other tissues. MRI is often used to diagnose problems with the nervous system, such as stroke or tumors. MRI can also be used to assess damage from injuries, such as head injuries. MRI is a valuable tool for diagnosing and treating many medical conditions.

Difference between EEG and MRI

EEG and MRI are both methods used to study brain activity. EEG measures electrical activity, while MRI measures magnetic fields. EEG is cheaper and can be done more quickly, but it is not as accurate as MRI. EEG is also limited to the surface of the brain, while MRI can provide images of the entire brain. EEG is better suited for studying rapidly changing brain activity, while MRI is better suited for studying more static features.


In conclusion, EEG and MRI are both valuable tools for understanding the human brain, but they offer different insights. EEG is non-invasive and can be used to measure electrical activity in the brain, while MRI uses magnetic fields and radio waves to create images of the brain. Each tool has its own strengths and weaknesses, so it’s important to understand which one will provide the information you need.

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