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.