The purpose of this investigation is to determine cortical mechanisms of adaptation to surgical or radiation treatment to the tongue. This study will use a non-invasive imaging technique, Functional Magnetic Resonance Imaging (fMRI), to investigate cortical responses to partial glossectomy or radiation therapy for treatment of a tongue malignancy. Patients with Stage I-IV (AJCC) malignancies of the tongue who are treated with surgery and or radiation therapy will be imaged using fMRI pre-operatively and at approximately six months postoperatively.