Note that this reference documentation is identical to the help that is displayed in MATLAB when you type “help ft_sysmat_openmeeg”.

  FT_SYSMAT_OPENMEEG creates a volume conduction model of the
  head using the boundary element method (BEM). This function takes
  as input the triangulated surfaces that describe the boundaries and
  returns as output a volume conduction model which can be used to
  compute leadfields.
 
  This function implements
    Gramfort et al. OpenMEEG: opensource software for quasistatic
    bioelectromagnetics. Biomedical engineering online (2010) vol. 9 (1) pp. 45
    http://www.biomedical-engineering-online.com/content/9/1/45
    doi:10.1186/1475-925X-9-45
  and
    Kybic et al. Generalized head models for MEG/EEG: boundary element method
    beyond nested volumes. Phys. Med. Biol. (2006) vol. 51 pp. 1333-1346
    doi:10.1088/0031-9155/51/5/021
 
  This link with FieldTrip is derived from the OpenMEEG project
  with contributions from Daniel Wong and Sarang Dalal, and uses external
  command-line executables. See http://openmeeg.github.io/
 
  Use as
    dsm = ft_sysmat_openmeeg(pos, headmodel, sens, nonadaptive_flag)
 
 
  See also FT_HEADMODEL_OPENMEEG, FT_SENSINTERP_OPENMEEG, FT_PREPARE_LEADFIELD