![]() ![]() They can also be used to help identify sleeping disorders and other medical conditions relating to the brain. Measuring activity in the brain can be a very useful tool in scientific studies. These are called electroencephalograms, or EEGs for short. If it’s an eloquent area of the brain, say in the left temporal lobe in somebody who is left language dominant, that might carry a higher risk of impairing some kind of eloquent function. Recordings of brain wave activity look like a series of waves. All of your senses sight, smell, hearing, touch, and taste depend on your brain. This review will discuss what defines eloquent cortex, and the various treatments of seizure foci in eloquent regions, including resective surgery, multiple. It is also busy working with other parts of your body. These are attached to the surface of the skin in specific places around the head. It runs your organs such as your heart and lungs. ![]() Electrodes are devices able to record electrical changes over time. Measuring electrical activity in the brain is usually done with electrodes. When a huge group of neurons signal at once, however, they can be recorded and measured with the help of special tools. Just one or two neurons signaling is too small a change to be noticed. When neurons send a signal they use electrical currents to pass messages to other nearby neurons. ![]() These electrical waves are called brain waves. How do you tell if the brain is working? What is it doing and how do you measure it? The head gear on the right that looks like it's from a work of science fiction measures electrical activity in the brain. Critical functional areas of the brain like cognitive, motor and language function can be mapped preoperatively with functional MRI, diffusion tensor imaging fiber tracking, magnetoencephalography, and navigated transcranial magnetic stimulation, or intraoperatively by direct electrical stimulation of the cortex or subcortical white matter tracts. ![]()
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