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

FT_HEADMODEL_CONCENTRICSPHERES creates a volume conduction model of the head based on three or four concentric spheres. For a 3-sphere model the spheres represent the skin surface, the outside of the skull and the inside of the skull For a 4-sphere model, the surfaces describe the skin, the outside-skull, the inside-skull and the inside of the cerebro-spinal fluid (CSF) boundaries. The innermost surface is sometimes also referred to as the brain surface, i.e. as the outside of the brain volume. This function takes as input a single headshape described with points and fits the spheres to this surface. If you have a set of points describing each surface, then this function fits the spheres to all individual surfaces. Use as headmodel = ft_headmodel_concentricspheres(mesh, ...) Optional input arguments should be specified in key-value pairs and can include conductivity = vector with the conductivity of each compartment fitind = vector with indices of the surfaces to use in fitting the center of the spheres See also FT_PREPARE_VOL_SENS, FT_COMPUTE_LEADFIELD

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