Transcranial Alternating Current Stimulation (tACS) for patients with Post-Stroke Anomia: Preliminary Data on Picture...

Area of Science:

• Neuroscience
• Neurology
• Speech and Language Pathology

Background:

• Anomia, aphasia characterized by word-finding difficulties, frequently occurs after stroke.
• Current treatments for post-stroke anomia have varying degrees of effectiveness, necessitating novel therapeutic approaches.

Purpose of the Study:

• To evaluate the efficacy of transcranial alternating current stimulation (tACS) as a treatment for post-stroke anomia.
• To assess the impact of tACS on picture-naming performance and underlying neural activity.

Main Methods:

• A Single-Case Experimental Design (SCED) was employed with two participants experiencing post-stroke anomia.
• An eight-week intervention involved a picture-naming task with alternating tACS and sham sessions, supplemented by electroencephalography (EEG) and behavioral assessments.
• Follow-up assessments were conducted at one and three months post-intervention.

Main Results:

• Picture-naming performance was significantly faster during tACS sessions compared to sham sessions.
• Both participants showed improvements in naming accuracy and speed, with sustained benefits observed at three-month follow-up.
• Post-treatment EEG patterns approached those of healthy individuals during similar tasks.

Conclusions:

• Preliminary findings suggest tACS is a promising intervention for improving anomia symptoms after stroke.
• The observed improvements in language function and neural activity indicate potentially lasting therapeutic effects.
• Larger-scale studies are warranted to confirm the efficacy and generalizability of tACS for treating post-stroke anomia.