i had a laminectomy one year ago due to nerves going numb below my butt if i stood or walked for more than 5 minutes. that overall lower numbness has gotten much better post surgery, but i still have weakness going up stairs ( especially after sitting on hard surfaces ) and also tingling/numbness in feet/shins has not improved much ( note-never did have much pain either before or after surgery ). any thoughts, ideas, suggestions?