Abstract: A method of identifying vibrotactile perception thresholds of tactile nerve endings at a skin site of a subject to assess sensory change in sensory nerve function is disclosed in which the results are substantially void of errors or inconsistencies. The measurement technique involves supporting the body part containing the skin site to be studied, and stimulating the skin surface with vibration under controlled contact conditions in such a way that the threshold at each frequency is mediated by a single mechanoreceptor population. Two known frequencies, within the range of frequencies in which the thresholds are mediated by the same mechanoreceptor population are applied to the skin site and this process is repeated for different mechanoreceptor populations. At each frequency of measurement, sensory responses are obtained from the subject as the vibration amplitude is increased and decreased.