Transcranial alternating current stimulation enhances speech comprehension in chronic post-stroke aphasia patients: A single-blind sham-controlled study

Aphasia is one of the most devastating complications following stroke [1]. Speech and language therapy (SLT) [2] is recommended for post-stroke aphasia (PSA), but the benefits remain limited. Several recent studies have examined the potential efficacy of combining SLT with various forms of non-invasive brain stimulation (NIBS), including transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS). While tDCS is accepted by clinicians and patients due to low cost and documented safety, it has not proven effective for improving speech comprehension [3].