Blar i Bergen Open Research Archive på forfatter "Riemer, Frank"

Viser treff 1-8 av 8

    • Brief international cognitive assessment for MS (BICAMS) and global brain volumes in early stages of MS – A longitudinal correlation study 

      Skorve, Ellen; Lundervold, Astri J.; Torkildsen, Øivind; Riemer, Frank; Grüner, Renate; Myhr, Kjell-Morten (Journal article; Peer reviewed, 2023)
      Background: Cognitive impairment is common in patients with multiple sclerosis, even in the early stages of the disease. The Brief International Cognitive Assessment for multiple sclerosis (BICAMS) is a short screening ...

    • Dynamic switching between intrinsic and extrinsic mode networks as demands change from passive to active processing 

      Riemer, Frank; Gruner, Eli Renate; Beresniewicz, Justyna; Kazimierczak, Katarzyna Anna; Ersland, Lars; Hugdahl, Kenneth (Journal article; Peer reviewed, 2020-12-08)
      In this study we report on the relationship between default and extrinsic mode networks across alternating brief periods of rest and active task processing. Three different visual tasks were used in a classic fMRI ON–OFF ...

    • Effects of Multi-Shell Free Water Correction on Glioma Characterization 

      Starck, Lea; Zaccagna, Fulvio; Pasternak, Ofer; Gallagher, Ferdia A.; Grüner, Renate; Riemer, Frank (Journal article; Peer reviewed, 2021)
      Diffusion MRI is a useful tool to investigate the microstructure of brain tumors. However, the presence of fast diffusing isotropic signals originating from non-restricted edematous fluids, within and surrounding tumors, ...

    • Electroconvulsive therapy triggers a reversible decrease in brain N-acetylaspartate 

      Erchinger, Vera Jane; Craven, Alexander R.; Ersland, Lars; Oedegaard, Ketil J.; Bartz-Johannessen, Christoffer; Hammar, Åsa Karin; Haavik, Jan; Riemer, Frank; Kessler, Ute; Oltedal, Leif (Journal article; Peer reviewed, 2023)
      Introduction: Based on previous research on electroconvulsive therapy (ECT) we have proposed a model where disruption, potentiation, and rewiring of brain networks occur in sequence and serve as the underlying therapeutic ...

    • Interactive Multimodal Imaging Visualization for Multiple Sclerosis Lesion Analysis 

      Sugathan, Sherin; Bartsch, Hauke; Riemer, Frank; Grüner, Eli Renate; Lawonn, Kai; Smit, Noeska Natasja (Journal article; Peer reviewed, 2021)
      Multiple Sclerosis (MS) is a brain disease that is diagnosed and monitored extensively through MRI scans. One of the criteria is the appearance of so-called brain lesions. The lesions show up on MRI scans as regions with ...

    • Longitudinal visualization for exploratory analysis of multiple sclerosis lesions 

      Sugathan, Sherin; Bartsch, Hauke; Riemer, Frank; Grüner, Eli Renate; Lawonn, Kai; Smit, Noeska Natasja (Journal article; Peer reviewed, 2022)
      In multiple sclerosis (MS), the amount of brain damage, anatomical location, shape, and changes are important aspects that help medical researchers and clinicians to understand the temporal patterns of the disease. Interactive ...

    • The NADPARK study: A randomized phase I trial of nicotinamide riboside supplementation in Parkinson’s disease 

      Brakedal, Brage; Dölle, Christian; Riemer, Frank; Ma, Yilong; Nido, Gonzalo Sanchez; Skeie, Geir Olve; Craven, Alexander R.; Schwarzlmüller, Thomas; Brekke, Njål; Diab, Joseph; Sverkeli, Lars Jansen; Skjeie, Vivian; Varhaug, Kristin Nielsen; Tysnes, Ole-Bjørn; Peng, Shichun; Haugarvoll, Kristoffer; Ziegler, Mathias; Grüner, Renate; Eidelberg, David; Tzoulis, Charalampos (Journal article; Peer reviewed, 2022)
      We conducted a double-blinded phase I clinical trial to establish whether nicotinamide adenine dinucleotide (NAD) replenishment therapy, via oral intake of nicotinamide riboside (NR), is safe, augments cerebral NAD levels, ...

    • Similarities and differences between intermittent and continuous resting-state fMRI 

      Beresniewicz, Justyna; Riemer, Frank; Kazimierczak, Katarzyna Anna; Ersland, Lars; Craven, Alexander R.; Hugdahl, Kenneth Jan; Grüner, Renate (Journal article; Peer reviewed, 2023)
      Introduction: Functional Magnetic Resonance Imaging (fMRI) block-design experiments typically include active ON-blocks with presentation of cognitive tasks which are contrasted with OFF- blocks with no tasks presented. ...