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Abstract
Major depressive disorder is a disease with prominent individual, medical and economic impacts. A relevant proportion of depressive patients suffering from a therapy-resistant course are increasingly being treated with antidepressant brain stimulation techniques. One of these interventions is the vagus nerve stimulation that has recently been tested in a number of clinical trials. To date, the acute and long-term efficacy of vagus nerve stimulation are still under debate. Thus further studies are required, especially since the exact mode of action of vagus nerve stimulation is still not well understood. In this paper we will review the results of existing clinical trials as well as the neurobiological effects measured with neuroimaging, biochemical and electrophysiology approaches.
Financial & competing interests disclosure
Malek Bajbouj received a research grant from Cyberonics and was involved in the D-03-study. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.