Non-invasive estimate of the number of fast myelinated fibers in peripheral nerves

The purpose of the method described in this paper is determination of an estimate for the number of fibers in a peripheral nerve, which have conduction velo- cities within a given range without the need for a biopsy. Its use is restricted to the relatively strong myelinated fibers, which can be electrically stimulated. It is applicable mainly to sensory nerves; for mixed nerves it can be used only if interference by concurrently excited myopotentials can be kept low.