Create a spherical model for forward solution calculation.
strHead center to use (in head coordinates). If ‘auto’, the head center will be calculated from the digitization points in info.
float | str | NoneIf float, compute spherical shells for EEG using the given radius. If ‘auto’, estimate an appropriate radius from the dig points in Info, If None, exclude shells (single layer sphere model).
mne.Info | NoneThe mne.Info object with information about the sensors and methods of measurement. Only needed if r0 or head_radius are 'auto'.
Relative radii for the spherical shells.
Sigma values for the spherical shells.
str | int | NoneControl verbosity of the logging output. If None, use the default
verbosity level. See the logging documentation and
mne.verbose() for details. Should only be passed as a keyword
argument.
ConductorModelThe resulting spherical conductor model.
See also
Notes
The default model has:
relative_radii = (0.90, 0.92, 0.97, 1.0)
sigmas = (0.33, 1.0, 0.004, 0.33)
These correspond to compartments (with relative radii in m and
conductivities σ in S/m) for the brain, CSF, skull, and scalp,
respectively.
New in version 0.9.0.
mne.make_sphere_model#Plot sensor denoising using oversampled temporal projection