Transcranial Alternating Current Stimulation (tACS) for the Recovery of Phonological Short-Term Memory in Patients With Aphasia After Stroke

Inclusion Criteria: * Diagnosed with left hemisphere stroke/aphasia * Consent date \>= 1 month after stroke onset * Fluent in English * 18 years of age or older Exclusion Criteria: * Severe cognitive, auditory or visual impairments that would preclude cognitive and language testing * Presence of major untreated or unstable psychiatric disease * A chronic medical condition that is not treated or is unstable * The presence of cardiac stimulators or pacemakers * Contraindications to MRI or tACS, e.g. patients with metallic implants, and/or history of skull fractures, pregnancy, skin diseases * History of ongoing or unmanaged seizures * History of dyslexia or other developmental learning disabilities