*All units are in microns
Soma_Surface is computed with the help of two mathematical
For single soma: 4*(pi)*(r^2).
For just one soma compartment, the Total_Sum, minimum, average
and maximum values are all the same. If the soma consists of more than
one compartment, then the correct value of the surface of the soma would
be returned under Total_Sum.
The single point spherical soma is converted to three point
cylindrical approximation. The surface area of this soma cylinder equals
the surface area of a sphere of radius r, where the height of the
cylinder equals radius of the spehere. For more details on soma format