Inclusion Criteria:

- Patient in whom a tumor invades or is directly adjacent to the expected location of
one of the language centers.

- At least 18 years of age

- English as first language

Exclusion Criteria:

- Patients with high grade tumors

- History of significant psychiatric condition (e.g. schizophrenia,
obsessive-compulsive disorder, significant dementia),

- History of the following neurological conditions: CVA, demyelinating conditions,
cerebral palsy, Alzheimer's disease.

- History of significant claustrophobic reactions.

- Pregnancy

- Standard contraindications to MR examinations (e.g. implanted stimulator)

- Patients, who were treated prior to our first scan, will not be eligible to
participate in this study