--is, in the end, functionally neurological; the bulging/herniated discs or arthritic bone spurs press on nerve roots or the spine itself.

That said, as Susanne indicates, you can be "co-morbid"--you can have mechanical/pressure problems with nerves that stem from spinal situations and you can have other neurological insults simultaneously (the so-called "double-crush phenomenon").

It would seem that you need some extensive imaging of the spine to see if there is a direct obvious cause of symptoms coming from there--but a standard work-up for other neuropathy causes wouldn't hurt, either. And, if the genetic form of neuropathy your mother has is one with known and observable biomarkers--which is likely, if she was definitively diagnosed--that testing should be done, too.

Many hereditary neuropathies have varied presentations in terms of location and intensity of symptoms, so it may not be easy to tease out just how much of your symptomology is from what percipitator.