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+=====  FT_HEADMODEL_CONCENTRICSPHERES =====
+Note that this reference documentation is identical to the help that is displayed in MATLAB when you type "help ft_headmodel_concentricspheres".
+<html><pre>
+  <a href=/reference/ft_headmodel_concentricspheres><font color=green>FT_HEADMODEL_CONCENTRICSPHERES</font></a> 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 <a href=/reference/ft_prepare_vol_sens><font color=green>FT_PREPARE_VOL_SENS</font></a>, <a href=/reference/ft_compute_leadfield><font color=green>FT_COMPUTE_LEADFIELD</font></a>
+</pre></html>