DEEP BRAIN STIMULATION AND POTENTIAL APPLICATION TO DEPRESSIVE MOOD DISORDERS

Abstract

Depression is a pervasive and debilitating mood disorder affecting millions worldwide, with drug-resistant depression (DRD) representing a critical challenge in psychiatric treatment. Current pharmacological interventions, including SSRIs and SNRIs, primarily address hypoactive neural circuits but fail to adequately target hyperactive pathways implicated in depression pathology. This limitation underscores the need for alternative therapeutic approaches capable of modulating dysregulated circuits directly. Deep brain stimulation (DBS) has emerged as a promising intervention, leveraging targeted neuromodulation to restore functional balance within affected networks. While precise sites of stimulation in regard to DRD are still under investigation, DBS has demonstrated efficacy in clinical trials, particularly in regions such as the subcallosal cingulate cortex (SCC) and lateral habenula (LHb). These structures play a central role in mood regulation and have been implicated in hyperconnectivity associated with DRD, making them viable targets for DBS intervention. By addressing previously untreatable aspects of depression, DBS introduces a paradigm shift in psychiatric care, challenging conventional approaches and paving the way for precision neuromodulation as a viable treatment strategy. As research progresses, optimizing DBS protocols, refining patient selection criteria, and evaluating its long-term efficacy remain crucial for integrating DBS into mainstream depression treatment.