Is there a test to measure sensory nerve damage?
Yes. There is a sensory test that measures just the three types of sensory nerve fibers which are the A beta, A delta and C fibers, which have relative sizes of a fire hose, a garden hose, and a soda straw. This is called a current perception threshold test (CPT) and this demonstrates damage to the sensory nerves, by measuring the ability to detect electric shock, which is a sensory phenomenon, using the specific frequencies detected by each of the three sensory nerves. The machine that makes these measurements is a Neurometer, and is made in Baltimore, Maryland. (Katims, JJ, Electrodiagnostic functional sensory evaluation of the patient with pain: A review of the neuroselective current perception threshold (CPT) and pain tolerance threshold (PTT), Pain Digest, 8:219-230, 1998).
