Electrocorticography in Mapping Functional Brain Areas During Surgery in Patients With Brain Tumors

This study is recording brain electrical activity during awake brain tumor surgery to help surgeons more precisely identify and protect areas of the brain responsible for movement and speech, improving the safety of tumor removal. **You may be eligible if...** - You are 18 years or older - You are scheduled for brain tumor surgery at MD Anderson Cancer Center for a newly diagnosed or returning brain tumor located near or in areas that control movement or speech - You have signed informed consent **You may NOT be eligible if...** - You already have significant weakness or paralysis in your arms or hands, or major speech difficulties, that would prevent you from performing tasks during awake surgery - You have severely impaired vision or hearing that could interfere with the tasks performed during surgery Talk to your doctor to see if this trial is right for you.