期刊
BRAIN STIMULATION
卷 15, 期 4, 页码 946-956出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.brs.2022.06.006
关键词
Norepinephrine; Locus coeruleus; Attention; Arousal; Anticipation; Cervical noninvasive vagal nerve; stimulation; Functional magnetic resonance imaging
资金
- Veterans Affairs, Career Development Program -Panel I (RRD8) [1IK2RX002920-01A1]
- National Institute of Alcohol Abuse and Alcoholism T32 fellowship [T32 AA013525]
- VA Clinical Science Research and Development Merit Award [I01 CX001762, I01 CX001542]
- VA [1122013, 1IK2RX002920-01A1] Funding Source: Federal RePORTER
The study found that transcutaneous cervical nVNS has valence-specific effects on reaction time and response patterns in healthy individuals during fMRI anticipation tasks, enhancing responsiveness to negatively valenced images and diminishing responsiveness to positively valenced images.
Background: Norepinephrine (NE) driven noninvasive vagus nerve stimulation (nVNS), which improves attention and reduces reaction time, augments learning. Equally important, endogenous NE mediated arousal is highly dependent on the valence (positive or negative) of the exogenous stimulus. But to date, no study has measured valence specific effects of nVNS on both functional magnetic resonance imaging (fMRI) anticipation task response and reaction time in healthy individuals. Therefore, the aim of this pilot study was to assess whether nVNS vs sham modulates valence cortical anticipation task response and reaction time in a normative sample.Methods: Participants received right sided transcutaneous cervical nVNS (N = 12) or sham (N = 12) stimulation during a 3T fMRI scan. Subjects first performed a continuous performance task (CPT) and then a cued anticipation task to images of positively and negatively valenced events during fMRI. Reaction times to cues and Blood oxygen level dependent (BOLD) response were examined over phase to identify effects of nVNS/sham over time.Results: nVNS reduced reaction time for all valenced image anticipation trials. With the fMRI anticipation task, we observed a valence-specific effect; nVNS increased responsivity to images with negative valence and decreased responsivity to images with positive valence, whereas sham showed an inverse valence response. Conclusions: nVNS was linked to reduced reaction time during the anticipation task. In tandem, nVNS consistently enhanced responsivity to negatively valenced images and diminished responsivity to positively valenced images, suggesting specific nVNS driven endogenous neurotransmitter signaling may contribute
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