Transcranial Direct Current Stimulation (tDCS)

Transcranial direct current stimulation (tDCS) is a non-invasive neuromodulation technique that delivers weak electrical currents through electrodes placed on the scalp. This technique can modulate cortical excitability and is used in research investigating motor control, cognition, learning, and brain network function.

tDCS can be administered using different electrode configurations, including multichannel montages designed to target specific cortical regions and distributed brain networks. Stimulation parameters and electrode placement are determined according to the research protocol and the equipment being used.

tDCS Training

Researchers interested in conducting tDCS studies at BIRC should complete the BIRC tDCS Training Request Form. BIRC staff will contact applicants to discuss equipment access, training requirements, and study-specific procedures.

Researchers must complete the applicable BIRC training and authorization requirements before independently operating stimulation equipment.

tDCS Safety and Participant Screening

Although tDCS is generally well tolerated when administered under established safety guidelines, appropriate participant screening, equipment preparation, and monitoring are essential.

Reported side effects may include scalp tingling, itching, headache, fatigue, and localized discomfort. Researchers should monitor participants throughout stimulation and respond promptly to any reported discomfort or adverse reactions.

Before stimulation, researchers must screen participants for potential contraindications and relevant medical conditions. Particular attention should be given to implanted electronic devices, including cardiac pacemakers and defibrillators, intracranial electrodes, and cranial abnormalities or implants that may affect stimulation safety.

Electrodes must be prepared and positioned according to the approved study protocol and manufacturer's instructions. Stimulation intensity, duration, electrode contact, and impedance must remain within the applicable device specifications and approved safety limits.

All studies must follow applicable institutional review board (IRB) requirements, informed consent procedures, and BIRC safety policies. Only appropriately trained and authorized personnel should administer tDCS.