root of the issues: http://neuromuscular.wustl.edu/antibody/sneuron.html

You should read this first to get a handle on how you might get from start to finish, take a look at the graph of possibilities: http://www.aafp.org/afp/980215ap/poncelet.html There is a lot more up in the 'stickies' at the top of the forum....just click on the 'blue' and go from there.