What Causes Weakened Motor Control, Weakness And Unsteady Gait?

I ve been experiencing motor control, weakness, and staggering with my lower limbs. Recently had a synovial cyst removed between C7 and T1 and expected recovery. Has helped some but done nothing for lower body extremities. No pain in back or lower limbs except get tired from prolong walk as when working my way through a box store. Had Lumbar MRI last Monday that identified severe narrowing at L3-L4 and L4-L5. Back to neurologist for lower extremity nerve function test tomorrow. Neurologist advises against further surgery and probably will recommend epidural steroid injections. Any advise. I m 72 and have been fairly active until 4 months ago when all this stuff started.