--for radiculopathy to cause issues with the larger, myelinated nerves, it is possible for compression issues in the spine to have effects on smaller, unmyelinated snesory nerves.

Many of these nerves originate from the dorsal root ganglia (which is where their cell bodies are--their axonal fibers can stretch out from there up to several feet), so if there are issues of compression around the dorsal root ganglia, often through posterior disc bulge, there may be small fiber effects.