Hello again Jeanne. Here's a link I mentioned last night, about decompression without fusion:
https://pubmed.ncbi.nlm.nih.gov/27074066/
The article is just one in a large cluster of articles about PT versus surgery; fusion; decompression. In many cases the list is only the titles of the articles; not even abstracts are given, but a persistent person can probably find a desired paper. Not sure if any of this pertains to your situation, but maybe you can find something useful.

I have an appointment with my PCP tomorrow, to assess the current numbness in my right foot and lower leg and find out where we go from there. It's weird.....PT is relieving the nerve tingling that started on the LEFT leg about 2 months ago, BUT (drat!) the RIGHT leg is getting worse day by day.