@misc{RoederSinger2020,
  author    = {R{\"o}der, Katrin and Singer, Christoph},
  title     = {Fortune, felicity and happiness in the early modern period},
  series = {Critical survey : CS},
  volume    = {32},
  journal   = {Critical survey : CS},
  number    = {3},
  publisher = {Berghahn Books},
  address   = {Oxford [u.a.]},
  issn      = {0011-1570},
  doi       = {10.3167/cs.2020.320301},
  pages     = {1 -- 7},
  year      = {2020},
  language  = {en}
}
@misc{SeyfriedRoedel2020,
  author    = {Seyfried, Salim and R{\"o}del, Claudia Jasmin},
  title     = {Blood flow matters in a zebrafish model of cerebral cavernous malformations},
  series = {Circulation research : an official journal of the American Heart Association},
  volume    = {126},
  journal   = {Circulation research : an official journal of the American Heart Association},
  number    = {1},
  publisher = {Lippincott Williams \& Wilkins},
  address   = {Baltimore, Md.},
  issn      = {0009-7330},
  doi       = {10.1161/CIRCRESAHA.119.316286},
  pages     = {E1 -- E2},
  year      = {2020},
  language  = {en}
}
@misc{Braun2020,
  author    = {Braun, Jean},
  title     = {Response to comment by Japsen et al. on "A review of numerical modeling studies of passive margin escarpments leading to a new analytical expression for the rate of escarpment migration velocity"},
  series = {Gondwana research : international geoscience journal ; official journal of the International Association for Gondwana Research},
  volume    = {65},
  journal   = {Gondwana research : international geoscience journal ; official journal of the International Association for Gondwana Research},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1342-937X},
  doi       = {10.1016/j.gr.2018.10.003},
  pages     = {174 -- 176},
  year      = {2020},
  language  = {en}
}
@misc{Schenck2020,
  author    = {Schenck, Marcia C.},
  title     = {Africa's forgotten refugee convention Africa is a Country},
  series = {Histories of Refuge - Geschichten der Zuflucht},
  journal   = {Histories of Refuge - Geschichten der Zuflucht},
  publisher = {Forum Transregionale Studien eV},
  address   = {Berlin},
  year      = {2020},
  language  = {en}
}
@misc{Schenck2020,
  author    = {Schenck, Marcia C.},
  title     = {History without borders},
  series = {African Refugees Crossroads},
  journal   = {African Refugees Crossroads},
  publisher = {H-Net: Humanities \& Social Sciences Online},
  address   = {East Lansing},
  year      = {2020},
  language  = {en}
}
@misc{OttoPiontekKalkuhletal.2020,
  author    = {Otto, Christian and Piontek, Franziska and Kalkuhl, Matthias and Frieler, Katja},
  title     = {Event-based models to understand the scale of the impact of extremes},
  series = {Nature energy},
  volume    = {5},
  journal   = {Nature energy},
  number    = {2},
  publisher = {Nature Publishing Group},
  address   = {London},
  issn      = {2058-7546},
  doi       = {10.1038/s41560-020-0562-4},
  pages     = {111 -- 114},
  year      = {2020},
  abstract  = {Climate change entails an intensification of extreme weather events that can potentially trigger socioeconomic and energy system disruptions. As we approach 1 degrees C of global warming we should start learning from historical extremes and explicitly incorporate such events in integrated climate-economy and energy systems models.},
  language  = {en}
}
@misc{Kohler2020,
  author    = {Kohler, Ulrich},
  title     = {Editorial: Survey Research Methods during the COVID-19 Crisis},
  series = {Survey Research Methods},
  volume    = {14},
  journal   = {Survey Research Methods},
  number    = {2},
  address   = {Konstanz},
  issn      = {1864-3361},
  doi       = {10.18148/srm/2020.v14i2.7769},
  pages     = {93 -- 94},
  year      = {2020},
  language  = {en}
}
@misc{XenikoudakisAhmedHarrisetal.2020,
  author    = {Xenikoudakis, Georgios and Ahmed, Mayeesha and Harris, Jacob Colt and Wadleigh, Rachel and Paijmans, Johanna L. A. and Hartmann, Stefanie and Barlow, Axel and Lerner, Heather and Hofreiter, Michael},
  title     = {Ancient DNA reveals twenty million years of aquatic life in beavers},
  series = {Current biology : CB},
  volume    = {30},
  journal   = {Current biology : CB},
  number    = {3},
  publisher = {Current Biology Ltd.},
  address   = {London},
  issn      = {0960-9822},
  doi       = {10.1016/j.cub.2019.12.041},
  pages     = {R110 -- R111},
  year      = {2020},
  abstract  = {Xenikoudakis et al. report a partial mitochondrial genome of the extinct giant beaver Castoroides and estimate the origin of aquatic behavior in beavers to approximately 20 million years. This time estimate coincides with the extinction of terrestrial beavers and raises the question whether the two events had a common cause.},
  language  = {en}
}
@misc{JeltschGrimm2020,
  author    = {Jeltsch, Florian and Grimm, Volker},
  title     = {Editorial},
  series = {Movement Ecology},
  volume    = {8},
  journal   = {Movement Ecology},
  number    = {1},
  publisher = {BioMed Central},
  address   = {London},
  issn      = {2051-3933},
  doi       = {10.1186/s40462-020-00210-0},
  pages     = {4},
  year      = {2020},
  language  = {en}
}
@misc{RodriguezSillkeSchumannLissneretal.2020,
  author    = {Rodr{\´i}guez Sillke, Yasmina and Schumann, Michael and Lissner, Donata and Branchi, Frederica and Glauben, Rainer and Siegmund, Britta},
  title     = {Small intestinal inflammation but not colitis drives pro-inflammatory nutritional antigen-specific T-cell response},
  series = {Journal of Crohn's and Colitis},
  volume    = {14},
  journal   = {Journal of Crohn's and Colitis},
  publisher = {Oxford Univ. Press},
  address   = {Oxford},
  issn      = {1873-9946},
  doi       = {10.1093/ecco-jcc/jjz203.172},
  pages     = {S154 -- S155},
  year      = {2020},
  abstract  = {Background: Inflammatory bowel disease (IBD) represents a dysregulation of the mucosal immune system. The pathogenesis of Crohn's disease (CD) and ulcerative colitis (UC) is linked to the loss of intestinal tolerance and barrier function. The healthy mucosal immune system has previously been shown to be inert against food antigens. Since the small intestine is the main contact surface for antigens and therefore the immunological response, the present study served to analyse food-antigen-specific T cells in the peripheral blood of IBD patients. Methods: Peripheral blood mononuclear cells of CD, with an affected small intestine, and UC (colitis) patients, either active or in remission, were stimulated with the following food antigens: gluten, soybean, peanut and ovalbumin. Healthy controls and celiac disease patients were included as controls. Antigen-activated CD4+ T cells in the peripheral blood were analysed by a magnetic enrichment of CD154+ effector T cells and a cytometric antigen-reactive T-cell analysis ('ARTE' technology) followed by characterisation of the ef- fector response. Results: The effector T-cell response of antigen-specific T cells were compared between CD with small intestinal inflammation and UC where inflammation was restricted to the colon. Among all tested food antigens, the highest frequency of antigen-specific T cells (CD4+CD154+) was found for gluten. Celiac disease patients were included as control, since gluten has been identified as the disease- causing antigen. The highest frequency of gluten antigen-specific T cells was revealed in active CD when compared with UC, celiac disease on a gluten-free diet (GFD) and healthy controls. Ovalbuminspecific T cells were almost undetectable, whereas the reaction to soybean and peanut was slightly higher. But again, the strong- est reaction was observed in CD with small intestinal involvement compared with UC. Remarkably, in celiac disease on a GFD only antigen-specific cells for gluten were detected. These gluten-specific T cells were characterised by up-regulation of the pro-inflammatory cytokines IFN-γ, IL-17A and TNF-α. IFN-g was exclusively elevated in CD patients with active disease. Gluten-specific T-cells expressing IL-17A were increased in all IBD patients. Furthermore, T cells of CD patients, independent of disease activity, revealed a high expression of the pro-inflammatory cytokine TNF-α. Conclusion: The 'ARTE'-technique allows to analyse and quantify food antigen specific T cells in the peripheral blood of IBD patients indicating a potential therapeutic insight. These data provide evidence that small intestinal inflammation in CD is key for the development of a systemic pro-inflammatory effector T-cell response driven by food antigens.},
  language  = {en}
}
@misc{Timme2020,
  author    = {Timme, Sinika},
  title     = {The face of affect and exertion},
  series = {Journal of sport \& exercise psychology},
  volume    = {42},
  journal   = {Journal of sport \& exercise psychology},
  publisher = {Human Kinetics Publishers},
  address   = {Champaign},
  issn      = {0895-2779},
  pages     = {S3 -- S3},
  year      = {2020},
  language  = {en}
}
@misc{Buerkner2020,
  author    = {B{\"u}rkner, Hans-Joachim},
  title     = {Europeanisation versus Euroscepticism},
  series = {Geopolitics},
  volume    = {25},
  journal   = {Geopolitics},
  number    = {3},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Philadelphia, Pa. [u.a]},
  issn      = {1465-0045},
  doi       = {10.1080/14650045.2020.1723964},
  pages     = {545 -- 566},
  year      = {2020},
  abstract  = {Several overlapping crises which affected the EU during the past ten years have recently aggravated. Especially the progressing refugee crisis, the persisting financial crisis and geopolitical turmoil in the EU's neighbourhood contributed to the rise of anti-EU movements and diverse articulations of Euroscepticism. Although public opinion and mainstream political analysis have easily identified right-wing populism as one of the most important drivers, it is still doubtful if it can be equated with Euroscepticism without further ado. To date it is by no means clear how and where Euroscepticism exactly originates.},
  language  = {en}
}
@misc{MoerschbacherJaworskaPeter2020,
  author    = {Moerschbacher, Bruno and Jaworska, Małgorzata and Peter, Martin G.},
  title     = {Obituary of George A.F. Roberts (1939-2018)},
  series = {Reactive \& functional polymers},
  volume    = {156},
  journal   = {Reactive \& functional polymers},
  publisher = {Elsevier},
  address   = {Amsterdam [u.a.]},
  issn      = {1381-5148},
  doi       = {10.1016/j.reactfunctpolym.2020.104711},
  pages     = {3},
  year      = {2020},
  language  = {en}
}
@misc{JasserKellyRothermel2020,
  author    = {Jasser, Greta and Kelly, Megan and Rothermel, Ann-Kathrin},
  title     = {Male supremacism and the Hanau terrorist attack},
  publisher = {International Centre for Counter-Terrorism (ICCT)},
  address   = {Den Haag},
  year      = {2020},
  language  = {en}
}
@misc{HermanussenSchefflerPulunganetal.2020,
  author    = {Hermanussen, Michael and Scheffler, Christiane and Pulungan, Aman B. and Batubara, Jose R. L. and Julia, Madarina and Bogin, Barry},
  title     = {Response to the correspondence referring to our article "Stunting is not a synonym of malnutrition" (2018EJCN0997RR) by Conny Tanjung, Titis Prawitasari, Damayanti Rusli Sjarif},
  series = {European journal of clinical nutrition},
  volume    = {74},
  journal   = {European journal of clinical nutrition},
  number    = {3},
  publisher = {Nature Publ. Group},
  address   = {New York, NY},
  issn      = {0954-3007},
  doi       = {10.1038/s41430-020-0571-1},
  pages     = {529 -- 531},
  year      = {2020},
  language  = {en}
}
@misc{WolffCanilRehermannetal.2020,
  author    = {Wolff, Christian Michael and Canil, Laura and Rehermann, Carolin and Nguyen, Ngoc Linh and Zu, Fengshuo and Ralaiarisoa, Maryline and Caprioglio, Pietro and Fiedler, Lukas and Stolterfoht, Martin and Kogikoski, Junior, Sergio and Bald, Ilko and Koch, Norbert and Unger, Eva L. and Dittrich, Thomas and Abate, Antonio and Neher, Dieter},
  title     = {Correction to 'Perfluorinated self-assembled monolayers enhance the stability and efficiency of inverted perovskite solar cells' (2020, 14 (2), 1445-1456)},
  series = {ACS nano},
  volume    = {14},
  journal   = {ACS nano},
  number    = {11},
  publisher = {American Chemical Society},
  address   = {Washington, DC},
  issn      = {1936-0851},
  doi       = {10.1021/acsnano.0c08081},
  pages     = {16156 -- 16156},
  year      = {2020},
  language  = {en}
}
@misc{OPUS4-44438,
  title     = {Research Data Policy and Recommendations for the Handling of Research Data},
  edition   = {Version: Oktober 2019},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  organization    = {University of Potsdam, Senate and Senate's Commission for Research and Junior Academics (FNK)},
  doi       = {10.25932/publishup-44438},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-444385},
  pages     = {19},
  year      = {2020},
  abstract  = {The Research Data Policy of the University of Potsdam has been ratified by Senate on September 25, 2019 and published in Amtliche Bekanntmachungen "Official Notices" September 30, 2019. It applies to all researchers and research support staff. The Recommendations for the Handling of Research Data at the University of Potsdam specify and complement the Research Data Policy of the University of Potsdam. They are aimed at all researchers and research support staff have been adopted by Senate's Commission for Research and Junior Academics (FNK) on on October 9, 2019. This record provides a non-official translation of both documents from the German original.},
  subject      = {Forschungsdaten},
  language  = {en}
}
@misc{WangOswaldGraeffetal.2020,
  author    = {Wang, Wei-shi and Oswald, Sascha and Gr{\"a}ff, Thomas and Lensing, Hermann-Josef and Liu, Tie and Strasser, Daniel and Munz, Matthias},
  title     = {Correction: Impact of river reconstruction on groundwater flow during bank filtration assessed by transient three-dimensional modelling of flow and heat transport. - Hydrogeology Journal. - Berlin: Springer. - 28 (2020) , S. 723. - https://doi.org/10.1007/s10040-019-02063-3},
  series = {Hydrogeology journal : official journal of the International Association of Hydrogeologists},
  volume    = {28},
  journal   = {Hydrogeology journal : official journal of the International Association of Hydrogeologists},
  number    = {7},
  publisher = {Springer},
  address   = {Berlin ; Heidelberg ; New York, NY},
  issn      = {1431-2174},
  doi       = {10.1007/s10040-020-02221-y},
  pages     = {2633 -- 2634},
  year      = {2020},
  language  = {en}
}
@misc{HoelzleBoerBjoerk2020,
  author    = {H{\"o}lzle, Katharina and Boer, Harry and Bj{\"o}rk, Jennie},
  title     = {Crisis management through creativity and innovation},
  series = {Creativity and innovation management},
  volume    = {29},
  journal   = {Creativity and innovation management},
  number    = {2},
  publisher = {Wiley-Blackwell},
  address   = {Oxford [u.a.]},
  issn      = {0963-1690},
  doi       = {10.1111/caim.12385},
  pages     = {195 -- 197},
  year      = {2020},
  language  = {en}
}
@misc{LinKhajooeiNairetal.2020,
  author    = {Lin, Chiao-I and Khajooei, Mina and Nair, Alexandra and Heikkila, Mika and Kaplick, Hannes and Tilman, Engel and Mayer, Frank},
  title     = {Activities of hip muscles in response to perturbed walking in individual with chronic ankle instability},
  series = {Medicine and science in sports and exercise : MSSE},
  volume    = {52},
  journal   = {Medicine and science in sports and exercise : MSSE},
  number    = {17},
  publisher = {Lippincott Williams \& Wilkins},
  address   = {Philadelphia},
  issn      = {0195-9131},
  doi       = {10.1249/01.mss.0000671060.98581.0b},
  pages     = {94 -- 94},
  year      = {2020},
  abstract  = {Chronic ankle instability (CAI) is not only an ankle issue, but also affects sensorimotor system. People with CAI show altered muscle activation in proximal joints such as hip and knee. However, evidence is limited as controversial results have been presented regarding changes in activation of hip muscles in CAI population. PURPOSE: To investigate the effect of CAI on activity of hip muscles during normal walking and walking with perturbations. METHODS: 8 subjects with CAI (23 ± 2 years, 171 ± 7 cm and 65 ± 4 kg) and 8 controls (CON) matched by age, height, weight and dominant leg (25 ± 3 years, 172 ± 7 cm and 65 ± 6 kg) walked shoed on a split-belt treadmill (1 m/s). Subjects performed 5 minutes of baseline walking and 6 minutes walking with 10 perturbations (at 200 ms after heel contact with 42 m/s2 deceleration impulse) on each side. Electromyography signals from gluteus medius (Gmed) and gluteus maximus (Gmax) were recorded while walking. Muscle amplitudes (Root Mean Square normalized to maximum voluntary isometric contraction) were calculated at 200 ms before heel contact (Pre200), 100 ms after heel contact (Post100) during normal walking and 200 ms after perturbations (Pert200). Differences between groups were examined using Mann Whitney U test and Bonferroni correction to account for multiple testing (adjust α level p≤ 0.0125). RESULT: In Gmed, CAI group showed lower muscle amplitude than CON group after heel contact (Post100: 18±7 \% and 47±21 \%, p< .01) and after walking perturbations ( 31±13 \% and 62±26 \%, p< .01), but not before heel contact (Pre200: 5±2 \% and 11±10 \%, p= 0.195). In Gmax, no difference was found between CAI and CON groups in all three time points (Pre200: 12±5 \% and 17±12 \%, p= 0.574; Post100: 41±21 \% and 41±13 \%, p= 1.00; Pert200: 79±46 \% and 62±35 \%, p= 0.505). CONCLUSION: People with CAI activated Gmed less than healthy control in feedback mechanism (after heel contact and walking with perturbations), but not in feedforward mechanism (before heel contact). Less activation on Gmed may affect the balance in frontal plane and increase the risk of recurrent ankle sprain, giving way or feeling ankle instability in patients with CAI during walking. Future studies should investigate the effect of Gmed strengthening or neuromuscular training on CAI rehabilitation.},
  language  = {en}
}
@misc{SchraplauSonnenburgWochatzetal.2020,
  author    = {Schraplau, Anne and Sonnenburg, Dominik and Wochatz, Monique and Engel, Tilman and Schom{\"o}ller, Anne and Risch, Lucie and Kaplick, Hannes and Mayer, Frank},
  title     = {Characterization of muscle damage and inflammation following repeated maximal eccentric loading of the trunk},
  series = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine},
  volume    = {52},
  journal   = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine},
  number    = {7S},
  publisher = {Lippincott Williams \& Wilkins},
  address   = {Philadelphia},
  issn      = {0195-9131},
  doi       = {10.1249/01.mss.0000679532.65880.af},
  pages     = {497 -- 497},
  year      = {2020},
  abstract  = {Eccentric exercises (ECC) induce reversible muscle damage, delayed-onset muscle soreness and an inflammatory reaction that is often followed by a systemic anti-inflammatory response. Thus, ECC might be beneficial for treatment of metabolic disorders which are frequently accompanied by a low-grade systemic inflammation. However, extent and time course of a systemic immune response after repeated ECC bouts are poorly characterized. PURPOSE: To analyze the (anti-)inflammatory response after repeated ECC loading of the trunk. METHODS: Ten healthy participants (33 ± 6 y; 173 ± 14 cm; 74 ± 16 kg) performed three isokinetic strength measurements of the trunk (concentric (CON), ECC1, ECC2, each 2 wks apart; flexion/extension, velocity 60°/s, 120s MVC). Pre- and 4, 24, 48, 72, 168h post-exercise, muscle soreness (numeric rating scale, NRS) was assessed and blood samples were taken and analyzed [Creatine kinase (CK), C-reactive protein (CRP), Interleukin-6 (IL-6), IL-10, Tumor necrosis factor-α (TNF-α)]. Statistics were done by Friedman's test with Dunn's post hoc test (α=.05). RESULTS: Mean peak torque was higher during ECC1 (319 ± 142 Nm) than during CON (268 ± 108 Nm; p<.05) and not different between ECC1 and ECC2 (297 ± 126 Nm; p>.05). Markers of muscle damage (peaks post-ECC1: NRS 48h, 4.4±2.9; CK 72h, 14407 ± 19991 U/l) were higher after ECC1 than after CON and ECC2 (p<.05). The responses over 72h (stated as Area under the Curve, AUC) were abolished after ECC2 compared to ECC1 (p<.05) indicating the presence of the repeated bout effect. CRP levels were not changed. IL-6 levels increased 2-fold post-ECC1 (pre: 0.5 ± 0.4 vs. 72h: 1.0 ± 0.8 pg/ml). The IL-6 response was enhanced after ECC1 (AUC 61 ± 37 pg/ml*72h) compared to CON (AUC 33 ± 31 pg/ml*72h; p<.05). After ECC2, the IL-6 response (AUC 43 ± 25 pg/ml*72h) remained lower than post-ECC1, but the difference was not statistically significant. Serum levels of TNF-α and of the anti-inflammatory cytokine IL-10 were below detection limits. Overall, markers of muscle damage and immune response showed high inter-individual variability. CONCLUSION: Despite maximal ECC loading of a large muscle group, no anti-inflammatory and just weak inflammatory responses were detected in healthy adults. Whether ECC elicits a different reaction in inflammatory clinical conditions is unclear.},
  language  = {en}
}
@misc{SchomoellerRischKaplicketal.2020,
  author    = {Schom{\"o}ller, Anne and Risch, Lucie and Kaplick, Hannes and Schraplau, Anne and Wochatz, Monique and Engel, Tilman and Sonnenburg, Dominik and Mayer, Frank},
  title     = {Changes in paraspinal muscle T2 times and creatine kinase after a bout of eccentric exercise},
  series = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine},
  volume    = {52},
  journal   = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine},
  number    = {17},
  publisher = {Lippincott Williams \& Wilkins},
  address   = {Philadelphia},
  issn      = {0195-9131},
  doi       = {10.1249/01.mss.0000685648.68626.f1},
  pages     = {929 -- 929},
  year      = {2020},
  abstract  = {Eccentric (ECC) exercises might cause muscle damage, characterized by delayed-onset muscle soreness, elevated creatine kinase (CK) levels and local muscle oedema, shown by elevated T2 times in magnet resonance imaging (MRI) scans. Previous research suggests a high inter-individual difference regarding these systemic and local responses to eccentric workload. PURPOSE: To analyze ECC exercise-induced muscle damage in lumbar paraspinal muscles assessed via MRI. METHODS: Ten participants (3f/7m; 33±6y; 174±8cm; 71±12kg) were included in the study. Quantitative paraspinal muscle constitution of M. erector spinae and M. multifidius were assessed in supine position before and 72h after an intense eccentric trunk exercise bout in a mobile 1.5 tesla MRI device. MRI scans were recorded on spinal level L3 (T2-weighted TSE echo sequences, 11 slices, 2mm slice thickness, 3mm gap, echo times: 20, 40, 60, 80, 100ms, TR time: 2500ms). Muscle T2 times were calculated for manually traced regions of interest of the respective muscles with an imaging software. The exercise protocol was performed in an isokinetic device and consisted of 120sec alternating ECC trunk flexion-extension with maximal effort. Venous blood samples were taken before and 72h after the ECC exercise. Descriptive statistics (mean±SD) and t-testing for pre-post ECC exercises were performed. RESULTS: T2 times increased from pre- to post-ECC MRI measurements from 55±3ms to 79±28ms in M. erector spinae and from 62±5ms to 78±24ms in M. multifidius (p<0.001). CK increased from 126±97 U/L to 1447±20579 U/L. High SDs of T2 time and CK in post-ECC measures could be due to inter-individual reactions to ECC exercises. 3 participants showed high local and systemic reactions (HR) with T2 time increases of 120±24\% (M. erector spinae) and 73±50\% (M. multifidius). In comparison, the remaining 7 participants showed increases of 11±12\% (M. erector spinae) and 7±9\% (M. multifidius) in T2 time. Mean CK increased 9.5-fold in the 3 HR subjects compared with the remaining 7 subjects. CONCLUSIONS: The 120sec maximal ECC trunk flexion-extension protocol induced high amounts of muscle damage in 3 participants. Moderate to low responses were found in the remaining 7 subjects, assuming that inter-individual predictors play a role regarding physiological responses to ECC workload.},
  language  = {en}
}
@misc{JoostBrechtMayeretal.2020,
  author    = {Joost, Theresa Anna and Brecht, Pia and Mayer, Frank and Cassel, Michael},
  title     = {Feasibility of open low-field MRI measurements in adolescent athletes with spondylolisthesis},
  series = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine},
  volume    = {52},
  journal   = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine},
  number    = {17},
  publisher = {Lippincott Williams \& Wilkins},
  address   = {Philadelphia},
  issn      = {0195-9131},
  doi       = {10.1249/01.mss.0000683832.74059.9d},
  pages     = {790 -- 790},
  year      = {2020},
  abstract  = {PURPOSE: To determine the feasibility of upright compared to supine MRI measurements to determine characteristics of the lumbar spine in AA with spondylolisthesis. METHODS: Ten AA (n=10; m/f: 4/6; 14.5±1.7y; 163±7cm; 52±8kg) from various sports, diagnosed with spondylolisthesis grade I-II Meyerding confirmed by x-ray in standing lateral view, were included. Open low-field MRI images (0.25 Tesla) in upright (82°) and supine (0°) position were evaluated by two observers. Medical imaging software was used to measure the anterior translation (AT, mm), lumbosacral joint angle (LSJA, °) and lordosis angle (LA, °). Reliability was analyzed by the intra-rater correlation coefficient (ICC) and standard error of measurements (SEM). RESULTS: Due to motion artifacts during upright position, measures of three participants had to be excluded. Between observers, AT ranged from 4.2±2.7mm to 5.5±1.9mm (ICC=0.94, SEM=0.6mm) in upright and from 4.9±2.4mm to 5.9±3.0mm (ICC=0.89, SEM=0.9mm) in supine position. LSJA varied from 5.1±2.2° to 7.3±1.5° (ICC=0.54, SEM=1.5°) in upright and from 9.8±2.5° to 10±2.4° (ICC=0.73, SEM=1.1°) in supine position. LA differed from 58.8±14.6° to 61.9±6° (ICC=0.94, SEM=1.19°) in upright and from 51.9±11.7° to 52.6±11.1° (ICC=0.98, SEM=1.59°) in supine position. CONCLUSIONS: Determination of AT and LA showed good to excellent reliability in both, upright and supine position. In contrast, reliability of LSJA had only moderate to good correlation between observers and should therefore be interpreted with caution. However, motion artifacts should be taken into consideration during upright imaging procedures.},
  language  = {en}
}
@misc{NairLinKhajooeietal.2020,
  author    = {Nair, Alexandra and Lin, Chiao-I and Khajooei, Mina and Heikkila, Mika and Engel, Tilman and Mayer, Frank},
  title     = {Side comparison of knee muscle activities in response to perturbed walking of unilateral ankle instability},
  series = {Medicine and science in sports and exercise : MSSE},
  volume    = {52},
  journal   = {Medicine and science in sports and exercise : MSSE},
  number    = {17},
  publisher = {Lippincott Williams \& Wilkins},
  address   = {Philadelphia},
  issn      = {0195-9131},
  doi       = {10.1249/01.mss.0000671088.10003.6b},
  pages     = {97 -- 97},
  year      = {2020},
  abstract  = {Acute ankle sprain leads in 40\% of all cases to chronic ankle instability (CAI). CAI is related to a variety of motor adaptations at the lower extremities. Previous investigations identified increased muscle activities while landing in CAI compared to healthy control participants. However, it remains unclear whether muscular alterations at the knee muscles are limited to the involved (unstable) ankle or are also present at the uninvolved leg. The latter might potentially indicate a risk of ankle sprain or future injury on the uninvolved leg. Purpose: To assess if there is a difference of knee muscle activities between the involved and uninvolved leg in participants with CAI during perturbed walking. Method: 10 participants (6 females; 4 males; 26±4 years; 169±9 cm; 65±7 kg) with unilateral CAI walked on a split-belt treadmill (1m/s) for 5 minutes of baseline walking and 6 minutes of perturbed walking (left and right side, each 10 perturbations). Electromyography (EMG) measurements were performed at biceps femoris (BF) and rectus femoris (RF). EMG amplitude (RMS; normalized to MVIC) were analyzed for 200ms pre-heel contact (Pre200), 100ms post heel contact (Post100) and 200ms after perturbation (Pert200). Data was analyzed by paired t-test/Wilcoxon test based on presence or absence of normal distribution (Bonferroni adjusted α level p≤ 0.0125). Results: No statistical difference was found between involved and uninvolved leg for RF (Pre200: 4±2\% and 11± 22\%, respectively, p= 0.878; Post100: 10± 5 and 18±31\%, p=0.959; Pert200: 6±3\% and 13±24\%, p=0.721) as well as for BF (Pre200: 12±7\% and 11±6, p=0.576; Post100: 10±7\% and 9±7\%, p=0.732; Pert200: 7±4 and 7±7\%, p=0.386). Discussion: No side differences in muscle activity could be revealed for assessed feedforward and feedback responses (perturbed and unperturbed) in unilateral CAI. Reduced inter-individual variability of muscular activities at the involved leg might indicate a rather stereotypical response pattern. It remains to be investigated, whether muscular control at the knee is not affected by CAI, or whether both sides adapted in a similar style to the chronic condition at the ankle.},
  language  = {en}
}