Introduction: Transcranial direct current stimulation tDCS, also known as tDCS (transcranial direct current stimulation), is a non-invasive brain stimulation technique that uses low-intensity electrical current to modulate neuronal activity in specific areas of the brain . The tDCS technique has been widely studied over the past few decades and has shown promise in the treatment of a variety of neurological and psychiatric conditions, including depression, anxiety, chronic pain, movement disorders, and traumatic brain injuries. Objective: The objective is a systematic review protocol. Methodology: This is a review protocol that will be registered in the International Prospective Register of Systematic Reviews (PROSPERO) with the registration number and will be conducted in accordance with the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes (PRISMA-P) . This systematic review protocol should include studies based on population, type of study, intervention and results following the PICO framework. Population “Population” (P): patients with mental disorders, Intervention “Intervention (I): tDCS, Comparator “Comparison” (C), placebo group, Outcome “Outcomes” (O), improvement of the clinical condition. Randomized clinical trials with a score of 6 on the PEDro scale will be included in this study, containing samples composed of individuals of both sexes with no age restrictions.
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