If you check out The Gluten File linked in my signature and scan down the right bar, you will see a page on diagnostic testing. The most important antibody tests to determine if you have gluten sensitivity are the antigliadin IgA and IgG. There is also a page on neuropathy that might be of interest to you, and you might find others applicable as well.
You might consider having your doctor contact one of these doctors~ both expert in the field of gluten sensitivity and neurological disease. They would be best able to suggest the correct diagnostic testing for antibodies associated with neurological disease. I have read that antiganglioside antibodies can be associated, but there are others that can be as well. I've also read that IVIG therapy is sometimes used.
(Hadjivassiliou papers linked to his name)
Marios Hadjivassiliou, Senior registrar in neurology
Department of Neurology, Royal Hallamshire Hospital,
Sheffield S10 2JF, United Kingdom
m.hadjivassiliou@sheffield.ac.uk
Russell L. Chin, MD
Norman Latov, MD, PhD
Peripheral Neuropathy Center
Weill Medical College of Cornell University,
The New York Presbyterian Hospitals,
New York, New York
Celiac Disease and Peripheral Neuropathy, Norman Latov, MD, PHD 2002
Celiac neuropathy, Chin, et al 2003
Hope this helps!
Cara