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024 7 _ |a 10.1038/s41598-019-47961-4
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037 _ _ |a DZNE-2020-07190
041 _ _ |a English
082 _ _ |a 600
100 1 _ |a Keute, Marius
|b 0
245 _ _ |a No modulation of pupil size and event-related pupil response by transcutaneous auricular vagus nerve stimulation (taVNS).
260 _ _ |a [London]
|c 2019
|b Macmillan Publishers Limited, part of Springer Nature
264 _ 1 |3 online
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|b Springer Science and Business Media LLC
|c 2019-08-07
264 _ 1 |3 print
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|c 2019-12-01
336 7 _ |a article
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520 _ _ |a Transcutaneous auricular vagus nerve stimulation (taVNS) bears therapeutic potential for a wide range of medical conditions. However, previous studies have found substantial interindividual variability in responsiveness to taVNS, and no reliable predictive biomarker for stimulation success has been developed so far. In this study, we investigate pupil size and event-related pupil response as candidate biomarkers. Both measures have a direct physiological link to the activity of the locus coeruleus (LC), a brainstem structure and the main source of norepinephrine in the brain. LC activation is considered one of the key mechanisms of action of taVNS, therefore, we expected a clear increase of the pupillary measures under taVNS compared to sham (placebo) stimulation, such that it could serve as a prospective predictor for individual clinical and physiological taVNS effects in future studies. We studied resting pupil size and pupillary responses to target stimuli in an auditory oddball task in 33 healthy young volunteers. We observed stronger pupil responses to target than to standard stimuli. However, and contrary to our hypothesis, neither pupil size nor the event-related pupil response nor behavioral performance were modulated by taVNS. We discuss potential explanations for this negative finding and its implications for future clinical investigation and development of taVNS.
536 _ _ |a 344 - Clinical and Health Care Research (POF3-344)
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542 _ _ |i 2019-08-07
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588 _ _ |a Dataset connected to CrossRef, PubMed,
650 _ 2 |a Adult
|2 MeSH
650 _ 2 |a Depression: therapy
|2 MeSH
650 _ 2 |a Ear Auricle: innervation
|2 MeSH
650 _ 2 |a Electrodes
|2 MeSH
650 _ 2 |a Epilepsy: therapy
|2 MeSH
650 _ 2 |a Female
|2 MeSH
650 _ 2 |a Healthy Volunteers
|2 MeSH
650 _ 2 |a Humans
|2 MeSH
650 _ 2 |a Locus Coeruleus: physiology
|2 MeSH
650 _ 2 |a Male
|2 MeSH
650 _ 2 |a Pupil: physiology
|2 MeSH
650 _ 2 |a Skin: innervation
|2 MeSH
650 _ 2 |a Transcutaneous Electric Nerve Stimulation: instrumentation
|2 MeSH
650 _ 2 |a Transcutaneous Electric Nerve Stimulation: methods
|2 MeSH
650 _ 2 |a Vagus Nerve: physiology
|2 MeSH
650 _ 2 |a Vagus Nerve Stimulation: instrumentation
|2 MeSH
650 _ 2 |a Vagus Nerve Stimulation: methods
|2 MeSH
650 _ 2 |a Young Adult
|2 MeSH
700 1 _ |a Demirezen, Mustafa
|b 1
700 1 _ |a Graf, Alina
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|u dzne
700 1 _ |a Müller, Notger
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700 1 _ |a Zaehle, Tino
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773 1 8 |a 10.1038/s41598-019-47961-4
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|t Scientific Reports
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773 _ _ |a 10.1038/s41598-019-47961-4
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