• A pilot study explored individualized closed-loop transcranial alternating current stimulation (tACS) for depression, adjusting stimulation frequency to each participant’s individual alpha frequency (IAF).
• The study found that repeated sessions of IAF-tACS reduced alpha frequency brain activity and improved mood, suggesting a potential cumulative effect via homeostatic mechanisms.
• Key questions remain regarding parameter optimization, safety of repeated treatments, and comparative efficacy with other stimulation modalities like tDCS.
• This research opens avenues for exploring individualized tES interventions, potentially enhancing therapeutic outcomes for depression and other clinical indications.