Welcome @dlmdinia, I agree that the tuning fork can be a legitimate tool to test nerve sensitivity. I was being a little flippant with my response and didn't mean to offend anyone. I was specifically talking about the dubious help and high cost of so called neuropathy clinics. I do think that a tuning fork is not a definitive test for neuropathy although it may provide information on nerve sensitivity. Again, it's just my non medical and personal opinion from my own research.

This short video by Matthew B Jensen Assistant Professor of Neurology, University of Wisconsin that gives a good explanation of how the different neuropathies are diagnosed -- https://www.youtube.com/watch?v=3FrQ7Glvgok

Neuropathy Commons aslo has some information on the criteria for diagnosing which I think the skin punch biopsy is the gold standard -- https://neuropathycommons.org/diagnosis/diagnosing-peripheral-neuropathy

I shared my neuropathy journey in another discussion here - https://connect.mayoclinic.org/comment/310341/. Have you been diagnosed with neuropathy? Do you mind sharing a little more about the outcome of the clinical trial, did it help you find a treatment?

The doctor used the similar items to test my nerve sensitivity.