![]() They can also be used to help identify sleeping disorders and other medical conditions relating to the brain. In all the cases the use of neuronavigation allowed minimally invasive approaches and radical excision of the lesions. Measuring activity in the brain can be a very useful tool in scientific studies. Areas of the brain that control speech, motor functions, and sensory processing which are required for an individual to understand and interact with others. These are called electroencephalograms, or EEGs for short. ![]() Recordings of brain wave activity look like a series of waves. These are attached to the surface of the skin in specific places around the head. Usually, a brain lesion is an incidental finding unrelated to the condition or symptom that led to the imaging test in the first place. 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. Identifying and subsequently avoiding these areas during a neurosurgery is crucial for improving recovery and postoperative quality of life. When neurons send a signal they use electrical currents to pass messages to other nearby neurons. The eloquent cortex consists of regions in the brain that are responsible for language comprehension, speech, and motor function. 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. 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.
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