Transcutaneous Vagus Nerve Stimulation Modulates Default Mode Network in Major Depressive Disorder. Biol Psychiatry 2016 Feb 15;79(4):266-73
Date
05/13/2015Pubmed ID
25963932Pubmed Central ID
PMC4838995DOI
10.1016/j.biopsych.2015.03.025Scopus ID
2-s2.0-84955106683 (requires institutional sign-in at Scopus site) 233 CitationsAbstract
BACKGROUND: Depression is the most common form of mental disorder in community and health care settings and current treatments are far from satisfactory. Vagus nerve stimulation (VNS) is a Food and Drug Administration approved somatic treatment for treatment-resistant depression. However, the involvement of surgery has limited VNS only to patients who have failed to respond to multiple treatment options. Transcutaneous VNS (tVNS) is a relatively new, noninvasive VNS method based on the rationale that there is afferent/efferent vagus nerve distribution on the surface of the ear. The safe and low-cost characteristics of tVNS have the potential to significantly expand the clinical application of VNS.
METHODS: In this study, we investigated how tVNS can modulate the default mode network (DMN) functional connectivity (FC) in mild or moderate major depressive disorder (MDD) patients. Forty-nine MDD patients were recruited and received tVNS or sham tVNS (stVNS) treatments.
RESULTS: Thirty-four patients completed the study and were included in data analysis. After 1 month of tVNS treatment, the 24-item Hamilton Depression Rating Scale score reduced significantly in the tVNS group as compared with the stVNS group. The FC between the DMN and anterior insula and parahippocampus decreased; the FC between the DMN and precuneus and orbital prefrontal cortex increased compared with stVNS. All these FC increases are also associated with 24-item Hamilton Depression Rating Scale reduction.
CONCLUSIONS: tVNS can significantly modulate the DMN FC of MDD patients; our results provide insights to elucidate the brain mechanism of tVNS treatment for MDD patients.
Author List
Fang J, Rong P, Hong Y, Fan Y, Liu J, Wang H, Zhang G, Chen X, Shi S, Wang L, Liu R, Hwang J, Li Z, Tao J, Wang Y, Zhu B, Kong JAuthor
Yang Wang MD Professor in the Radiology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AdolescentAdult
Aged
China
Depressive Disorder, Major
Female
Humans
Magnetic Resonance Imaging
Male
Middle Aged
Parietal Lobe
Psychiatric Status Rating Scales
Regression Analysis
Single-Blind Method
Transcutaneous Electric Nerve Stimulation
Treatment Outcome
Vagus Nerve
Vagus Nerve Stimulation
Young Adult
