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

Inclusion Criteria: * Patients undergoing a tumor resection at the University of Texas M. D. Anderson Cancer Center for a newly diagnosed as well as recurrent primary or metastatic brain tumor located in or adjacent to motor and/or speech brain areas * Patients \>= 18 years of age * Signed informed consent Exclusion Criteria: * Patients with significant neurological motor deficits of the upper extremities, and/or speech deficits, which would preclude them from performing the while awake intra-operative tasks at the discretion of the principal investigator (PI) * Patients who have impaired vision and/or hearing and whose performance could affect the study will be excluded at the discretion of the PI