@misc{WeymarVenturaBortGenheimeretal.2017,
  author    = {Weymar, Mathias and Ventura-Bort, Carlos and Genheimer, Hannah and Wirkner, Janine and Wendt, Julia and Hamm, Alfons O.},
  title     = {THE P300 AND THE LC-NE SYSTEM: NEW INSIGHTS FROM TRANSCUTANEOUS VAGUS NERVE STIMULATION (TVNS)},
  series = {Psychophysiology : journal of the Society for Psychophysiological Research},
  volume    = {54},
  journal   = {Psychophysiology : journal of the Society for Psychophysiological Research},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0048-5772},
  pages     = {S145 -- S145},
  year      = {2017},
  language  = {en}
}
@misc{WeymarVenturaBortWirkneretal.2019,
  author    = {Weymar, Mathias and Ventura-Bort, Carlos and Wirkner, Janine and Genheimer, Hannah and Wendt, Julia and Hamm, Alfons O.},
  title     = {Effects of Transcutaneous Vagus Vagus Nerve Stimulation (TVNS) on selective attentions and emotional episodic memory : findings from ERP research},
  series = {Psychophysiology : journal of the Society for Psychophysiological Research},
  volume    = {56},
  journal   = {Psychophysiology : journal of the Society for Psychophysiological Research},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0048-5772},
  doi       = {10.1111/psyp.13501},
  pages     = {S12 -- S12},
  year      = {2019},
  abstract  = {Recent research indicates that non- invasive stimulation of the afferent auricular vagal nerve (tVNS) may modulate various cognitive and affec-tive functions, likely via activation of the locus coeruleus- norepinephrine (LC- NE) system. In a series of ERP studies we found that the attention- related P300 component is enhanced during continuous vagal stimula-tion, compared to sham, which is also related to increased salivary alpha amylase levels (a putative indirect marker for central NE activation). In another study, we investigated the effect of continuous tVNS on the late positive potential (LPP), an electrophysiological index for motivated atten-tion toward emotionally evocative cues, and the effects of tVNS on later recognition memory (1- week delay). Here, vagal stimulation prompted earlier LPP differences (300- 500 ms) between unpleasant and neutral scenes. During retrieval, vagal stimulation significantly improved memory performance for unpleasant, but not neutral pictures, compared to sham stimulation, which was also related to enhanced salivary alpha amylase levels. In line, unpleasant images encoded under tVNS compared to sham stimulation also produced enhanced ERP old/new differences (500- 800 ms) during retrieval indicating better recollection. Taken together, our studies suggest that tVNS facilitates attention, learning and episodic memory, likely via afferent projections to the arousal- modulated LC- NE system. We will, however, also show data that point to critical stimulation parameters (likely duration and frequency) that need to be considered when applying tVNS},
  language  = {en}
}
@misc{WeymarVenturaBortWirkneretal.2018,
  author    = {Weymar, Mathias and Ventura-Bort, Carlos and Wirkner, Janine and Wendt, Julia and Hamm, Alfons},
  title     = {Effects of Transcutaneous Vagus Nerve Stimulation (TVNS) on unpleasant picture processing and long-term memory},
  series = {Psychophysiology : journal of the Society for Psychophysiological Research},
  volume    = {55},
  journal   = {Psychophysiology : journal of the Society for Psychophysiological Research},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0048-5772},
  pages     = {S18 -- S18},
  year      = {2018},
  language  = {en}
}