Cerebellar Stimulation for Aphasia Rehabilitation

Inclusion Criteria: * Chronic ischemic or hemorrhagic left hemisphere stroke * Fluent speaker of English by self-report * Age 18 or older * 6 months post onset of stroke * Diagnosis of aphasia and naming impairment using the Western Aphasia Battery-Revised Exclusion Criteria: * Lesion in the right cerebellum * Previous neurological disorder (other than stroke) affecting the brain, or any other neurodegenerative disorder or psychiatric disorder * Seizures during the previous 6 months * Uncorrected visual loss or hearing loss by self-report * Use of medications that lower the seizure threshold (e.g., methylphenidate) * Use of N-methyl-D-aspartate (NMDA) antagonists (e.g., memantine) * History of brain surgery or any metal in the head * Severely impaired auditory comprehension (lower than 2 on the Comprehension subscore on the Western Aphasia Battery-Revised) * Severely limited verbal output (lower than 2 on the Spontaneous Speech rating scale on the Western Aphasia Battery-Revised) * Individuals with severe claustrophobia, cardiac pacemakers or ferromagnetic implants, and pregnant women will be excluded from the MRI portion of the study.