scholarly journals Effects of transcutaneous auricular vagus nerve stimulation on reversal learning, tonic pupil size, salivary alpha‐amylase, and cortisol

2021 ◽  
Author(s):  
Martina D’Agostini ◽  
Andreas M. Burger ◽  
Mathijs Franssen ◽  
Nathalie Claes ◽  
Mathias Weymar ◽  
...  
Keyword(s):  
Vagus Nerve ◽  
Reversal Learning ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Pupil Size ◽  
Alpha Amylase ◽  
Salivary Alpha Amylase ◽  
Tonic Pupil

scholarly journals Transcutaneous auricular vagus nerve stimulation increases eye-gaze on salient facial features and oxytocin release

2021 ◽  
Author(s):  
Siyu Zhu ◽  
Yanan Qing ◽  
Yingying Zhang ◽  
Xiaolu Zhang ◽  
Fangyuan Ding ◽  
...  
Keyword(s):  
Social Cognition ◽  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Pupil Size ◽  
Therapeutic Potential ◽  
Fixation Time ◽  
Facial Features ◽  
Oxytocin Release ◽  
The Impact

Background: Transcutaneous auricular vagus nerve stimulation (taVNS) is a non-invasive neuromodulation technique with promising therapeutic potential in the context of epilepsy, pain, and depression and which may also have beneficial effects on social cognition. However, the underlying mechanisms of taVNS are unclear and evidence regarding its role in social cognition improvement is limited. Objective: In order to investigate the impact of taVNS on social cognition we have studied its effects on gaze towards emotional faces using an eye-tracking task and also on release of the neuropeptide oxytocin which plays a key role in influencing social cognition and motivation. Methods: A total of fifty-four subjects were enrolled in a sham-controlled, participant-blind crossover experiment, consisting of two treatment sessions, separated by one week. In one session participants received 30-min taVNS (tragus), and in the other, they received 30-min sham (earlobe) stimulation with the treatment order counterbalanced across participants. Gaze duration towards the faces and facial features (eyes, nose, and mouth) were measured together with resting pupil size. Additionally, saliva samples were taken for the measurement of oxytocin concentrations by enzyme-linked immunoassay. Results: Saliva oxytocin concentrations increased significantly after taVNS compared to sham stimulation, while resting pupil size did not. In addition, taVNS increased fixation time on the nose region irrespective of face emotion, and this was positively correlated with increased saliva oxytocin concentrations. Conclusion: Our findings suggest that taVNS biases visual attention towards socially salient facial features across different emotions and this is associated with its effects on increasing endogenous oxytocin release.

Acute vagus nerve stimulation enhances reversal learning in rats

2021 ◽  
pp. 107498
Author(s):  
Lindsay K-P Altidor ◽  
Matthew M. Bruner ◽  
Josue F. Deslauriers ◽  
Tyler S. Garman ◽  
Saúl Ramirez ◽  
...  
Keyword(s):  
Vagus Nerve ◽  
Reversal Learning ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation

scholarly journals No modulation of pupil size and event-related pupil response by transcutaneous auricular vagus nerve stimulation (taVNS)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Marius Keute ◽  
Mustafa Demirezen ◽  
Alina Graf ◽  
Notger G. Mueller ◽  
Tino Zaehle
Keyword(s):  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Pupil Size ◽  
Pupil Response

Effect of Transcutaneous Vagus Nerve Stimulation in Dysphagia After Lateral Medullary Infarction: A Case Report

2019 ◽  
Vol 28 (4) ◽  
pp. 1381-1387
Author(s):  
Ying Yuan ◽  
Jie Wang ◽  
Dongyu Wu ◽  
Dahua Zhang ◽  
Weiqun Song
Keyword(s):  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Rating Scale ◽  
Tube Feeding ◽  
Nasogastric Feeding ◽  
Lateral Medullary Infarction ◽  
Severe Dysphagia ◽  
Transcutaneous Vagus Nerve Stimulation ◽  
Medullary Infarction

Purpose Severe dysphagia with weak pharyngeal peristalsis after dorsal lateral medullary infarction (LMI) requires long-term tube feeding. However, no study is currently available on therapeutic effectiveness in severe dysphagia caused by nuclear damage of vagus nerve after dorsal LMI. The purpose of the present investigation was to explore the potential of transcutaneous vagus nerve stimulation (tVNS) to improve severe dysphagia with weak pharyngeal peristalsis after dorsal LMI. Method We assessed the efficacy of 6-week tVNS in a 28-year-old woman presented with persisting severe dysphagia after dorsal LMI who had been on nasogastric feeding for 6 months. tVNS was applied for 20 min twice a day, 5 days a week, for 6 weeks. The outcome measures included saliva spitted, Swallow Function Scoring System, Functional Oral Intake Scale, Clinical Assessment of Dysphagia With Wallenberg Syndrome, Yale Pharyngeal Residue Severity Rating Scale, and upper esophagus X-ray examination. Results After tVNS, the patient was advanced to a full oral diet without head rotation or spitting. No saliva residue was found in the valleculae and pyriform sinuses. Contrast medium freely passed through the upper esophageal sphincter. Conclusion Our findings suggest that tVNS might provide a useful means for recovery of severe dysphagia with weak pharyngeal peristalsis after dorsal LMI. Supplemental Material https://doi.org/10.23641/asha.9755438

Vagus nerve stimulation in rheumatoid arthritis – Authors' reply

2021 ◽  
Vol 3 (1) ◽  
pp. e14-e15
Author(s):  
Mark C Genovese ◽  
Yaakov A Levine ◽  
David Chernoff
Keyword(s):  
Rheumatoid Arthritis ◽  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation
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