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@ARTICLE{Hansen:139688,
      author       = {Hansen, Niels and Chaieb, Leila and Derner, Marlene and
                      Hampel, Kevin G and Elger, Christian E and Surges, Rainer
                      and Staresina, Bernhard and Axmacher, Nikolai and Fell,
                      Juergen},
      title        = {{M}emory encoding-related anterior hippocampal potentials
                      are modulated by deep brain stimulation of the entorhinal
                      area.},
      journal      = {Hippocampus},
      volume       = {28},
      number       = {1},
      issn         = {1050-9631},
      address      = {New York, NY [u.a.]},
      publisher    = {Wiley},
      reportid     = {DZNE-2020-06010},
      pages        = {12-17},
      year         = {2018},
      abstract     = {Deep brain stimulation (DBS) of the human entorhinal area
                      using 50 Hz pulses has revealed conflicting results
                      regarding memory performance. Moreover, its impact on
                      memory-related hippocampal potentials has not yet been
                      investigated.We recorded data from seven epilepsy patients
                      implanted with depth electrodes in the entorhinal cortex,
                      hippocampus, amygdala, and parahippocampal cortex.
                      Entorhinal DBS (bipolar, biphasic 50 Hz pulses, on- and
                      off-cycles of 15 s) was applied with low amplitude (0.1 mA)
                      to resemble physiologic conditions. During DBS on- and
                      off-periods, patients learned noun-color associations that
                      were later tested.During entorhinal DBS we observed more
                      positive deflections of event-related potentials (ranging
                      from 700 to 950 ms) in the anterior hippocampus for the on-
                      vs. off-condition. We detected no effects in the amygdala,
                      mid hippocampus and parahippocampal cortex. On the
                      behavioral level, no differences in memory performance (item
                      and source memory) were apparent in the on- vs.
                      off-condition, neither across all trials nor across
                      patients.Our findings indicate that entorhinal DBS with low
                      amplitude has an impact on memory encoding-related
                      potentials within the anterior hippocampus, but not on
                      memory performance per se.},
      keywords     = {Adult / Amygdala: physiology / Amygdala: physiopathology /
                      Association Learning: physiology / Deep Brain Stimulation:
                      methods / Entorhinal Cortex: physiology / Entorhinal Cortex:
                      physiopathology / Epilepsy, Temporal Lobe: physiopathology /
                      Epilepsy, Temporal Lobe: psychology / Epilepsy, Temporal
                      Lobe: therapy / Evoked Potentials / Female / Hippocampus:
                      physiology / Hippocampus: physiopathology / Humans / Male /
                      Memory: physiology},
      cin          = {AG Axmacher},
      ddc          = {610},
      cid          = {I:(DE-2719)5000027},
      pnm          = {344 - Clinical and Health Care Research (POF3-344)},
      pid          = {G:(DE-HGF)POF3-344},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29034573},
      doi          = {10.1002/hipo.22808},
      url          = {https://pub.dzne.de/record/139688},
}