The 'fieldpotential.tar.gz' file will extract to the
fieldpotential directory, which contains a description file in the format
of the GENESIS Reference Manual, the source code files and the library
startup script file for the two GENESIS objects 'fp-box' and fp_cylinder'.
These objects, contributed by Armen Sargsyan, calculate the extracellular
field potential generated by a large population of pyramidal-like cells
that uniformly fill either a box-shaped or cylindrical shaped region.
If the cells are identical and are simultaneously and uniformly activated,
it is not necessary to model a large number of identical cells - it would
be enough to model just one cell and add CURRENT messages from its
compartments to fp_box or fp_cylinder object. In case there are several
cell types (differing in their parameters or stimulation patterns, but
still uniformly filling the same volume), one cell of each cell type
should be modeled, and again CURRENT messages from all compartments of all
modeled cells should be added to a single fp_box or fp_cylinder object.
Further details are given in fieldpotential/README.