Acute Transcranial Direct Current Stimulation in Patients With Systemic Autoimmune Myopathies

This Brazilian study is investigating whether transcranial direct current stimulation (tDCS) — a non-invasive brain stimulation technique — can help improve muscle weakness in patients with systemic autoimmune myopathies (inflammatory muscle diseases). tDCS delivers a mild electrical current to the scalp and may help the nervous system function better in people with these conditions. You may be eligible if: - You have been diagnosed with a systemic autoimmune myopathy (classified by EULAR/ACR 2017 or Connors criteria) - You have objective limb muscle weakness - You are between 18 and 80 years old You may NOT be eligible if: - You have an active cancer (neoplasia) - You use a heart pacemaker - You have visceral metallic clips - You have active infections (HIV, HTLV-1, hepatitis, etc.) - You are pregnant - You have a history of seizures or epilepsy Talk to your rheumatologist or neurologist about whether your autoimmune muscle disease and overall health make you a candidate for brain stimulation therapy research.