ADHD stands out as the most prevalent neurodevelopmental disorder of childhood. Attention-deficit/hyperactivity disorder (ADHD) is a chronic and heterogeneous neurodevelopmental disorder, characterized by hyperactivity, impulsivity and/or reduction of sustained attention associated with distractibility, reduced attention, and working memory impairments. ADHD is thought to result from functional impairments of the prefrontal cortex and its associated neural networks. Studies demonstrate the clinical effectiveness of stimulant medications but side effects are common with long term benefits in question. In this context, many other novel therapeutic strategies are currently under investigation for ADHD.
One group of studies demonstrates transcranial direct current stimulation (tDCS) as a promising method for altering cortical excitability. By using low-intensity electrical stimulation tDCS modulates targeted brain regions like the dorsolateral prefrontal cortex (DLPFC) to increase or decrease excitability of the neural tissue. Reported effects of tDCS include improved cognition related to response inhibition, working memory, attention, and cognitive flexibility with reduction in the clinical symptoms of impulsivity and inattention. There are no serious or adverse reports resulting from treatment with tDCS in adults or children. Overall, tDCS seems to be a promising method for improving ADHD deficits. tDCS sessions last 20 minutes are easily implemented in a flexible at home therapy that is very safe and convenient.