Hi Ray, unfortunately, "idiopathic polyneuropathy" is not a genuine diagnosis; on the contrary, it means "we don't know what it is." Upwards of 30 per cent of those with idiopathic (unexplained) PN are ultimately shown to have some degree of pathological glucose intolerance, according to some studies. When you have PN plus notable spinal issues the diagnosis can become even more difficult. It is possible the two are linked or that there are multiple, separate causes. If your PN has developed distally (in the extremities) and symmetrically and then spread again in a symmetrical pattern it is likely that something different from or in addition to spinal issues is at work. I am in the same situation, trying to sort this out. You might also consider adding acetyl-L-carnitine to your supplement regimen.