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@ARTICLE{Caspers:906629,
      author       = {Caspers, Svenja and Axer, Markus and Gräßel, David and
                      Amunts, Katrin},
      title        = {{A}dditional fiber orientations in the sagittal
                      stratum—noise or anatomical fine structure?},
      journal      = {Brain structure $\&$ function},
      volume       = {227},
      issn         = {0044-2232},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2022-01565},
      pages        = {1331–1345},
      year         = {2022},
      abstract     = {The sagittal stratum is a prominent and macroscopically
                      clearly visible white-matter structure within occipital and
                      parietal lobes with a highly organized structure of parallel
                      fibers running in rostro-caudal direction. Apart from the
                      major tract running through, i.e., the optic radiation, the
                      source and arrangement of other fibers within the sagittal
                      stratum is only partially understood. Recent diffusion
                      imaging studies in-vivo suggest additional minor fiber
                      directions, perpendicular to the major rostro-caudal ones,
                      but the spatial resolution does not allow to resolve them,
                      and to unambiguously distinguish it from noise. Taking this
                      previous evidence as motivation, the present study used 3D
                      polarized light imaging (3D-PLI) for micrometer resolution
                      analysis of nerve fibers in postmortem specimens of a vervet
                      monkey brain. The analysis of coronal occipital and parietal
                      sections revealed that the sagittal stratum consisted of an
                      external and an internal layer, which are joined and crossed
                      by fibers from the surrounding white matter and the tapetum.
                      Fibers from different parietal and occipital regions entered
                      the sagittal stratum in the dorsal, ventral or middle
                      sector, as solid large bundles or as several small fiber
                      aggregations. These patterns were remarkably similar to
                      published results of tracer experiments in macaques. Taking
                      this correspondence as external validation of 3D-PLI enabled
                      translation to the human brain, where a similarly complex
                      fiber architecture within the sagittal stratum could be
                      exemplified in a human hemisphere in our study. We thus
                      argue in favor of a dedicated fiber microstructure within
                      the sagittal stratum as a correlate of the additional fiber
                      directions typically seen in in-vivo diffusion imaging
                      studies.},
      cin          = {INM-1},
      ddc          = {610},
      cid          = {I:(DE-Juel1)INM-1-20090406},
      pnm          = {5251 - Multilevel Brain Organization and Variability
                      (POF4-525) / JL SMHB - Joint Lab Supercomputing and Modeling
                      for the Human Brain (JL SMHB-2021-2027) / HBP SGA3 - Human
                      Brain Project Specific Grant Agreement 3 (945539)},
      pid          = {G:(DE-HGF)POF4-5251 / G:(DE-Juel1)JL SMHB-2021-2027 /
                      G:(EU-Grant)945539},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:35113243},
      UT           = {WOS:000750747600002},
      doi          = {10.1007/s00429-021-02439-w},
      url          = {https://juser.fz-juelich.de/record/906629},
}