Related Experiment Video
Updated: Feb 6, 2026

Vagus Nerve Stimulation As an Adjunctive Neurostimulation Tool in Treatment-resistant Depression
Published on: January 7, 2019
Vagus Nerve Stimulation: Changing the Paradigm for Chronic Severe Depression?
Scott T Aaronson1, Charles R Conway2
1Clinical Research Programs, Sheppard Pratt Health System, 6501 North Charles Street, Towson, MD 21204, USA; Department of Psychiatry, University of Maryland Medical School, 655 West Baltimore Street, Baltimore, MD 21201, USA.
Vagus nerve stimulation (VNS) shows promise for treatment-resistant depression, with open-label studies indicating positive effects. New external stimulation methods may increase interest in this therapeutic approach.
Area of Science:
- Neuroscience
- Psychiatry
- Medical Technology
Background:
- Vagus nerve stimulation (VNS) is an established neuromodulation technique.
- Its efficacy in treatment-resistant depression (TRD) has been investigated through various clinical studies.
- Limited insurance coverage has historically been a barrier to VNS adoption for TRD.
Purpose of the Study:
- To review the clinical development and efficacy of VNS for depression.
- To analyze results from key clinical trials investigating VNS in TRD.
- To propose future directions for VNS optimization and application in psychiatric care.
Main Methods:
- Review of existing literature on VNS for depression.
- Analysis of data from open-label and clinical trials.
- Exploration of emerging VNS technologies and their potential impact.
Main Results:
- Open-label studies demonstrate significant positive effects of VNS in treatment-resistant populations.
- Recent positive data may prompt insurance companies to reconsider coverage.
- Novel external VNS methods are emerging, potentially increasing clinical interest.
Conclusions:
- VNS represents a viable therapeutic option for individuals with severe, refractory depression.
- Continued research and technological advancements are crucial for expanding VNS accessibility and effectiveness.
- Future strategies should focus on optimizing VNS delivery and patient selection for improved outcomes.
Related Concept Videos
Long-term Depression
Long-term Depression
Calcium Ion Concentration Mechanism
If over...
Global Climate Change
Freezing Point Depression and Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
Depressants
Alcohol is a common depressant that can induce a sense of relaxation and reduced inhibition at low doses. Contrary to its occasional...
Depression: Overview

