You're welcome. It was one of those interesting things that I learned upon being diagnosed with ms. I had had some bizarre moments of sensing my name called up a flight of stairs or thinking that I had seen shadows move accross the room. Apparently an "injury" on the brain, such as a lesion can create an environment(within the brain) that can lead to auditory/visual(even olfactory) hallucinations. It was written somewhere that good sleep health can reduce symptoms, among other things. I learned of this so long ago that off the top of my head I wouldn't be able to find links or anything.
Do you ever reach out on Neurotalk, seeing that you have neuropathic pain? Sometimes being amongst both sides of the conversation so to speak can give all around needed support.