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To the Editor:—
In The Journal, July 31, page 346, Dr. E. L. Stern describes an instrument for localizing pain. This instrument was introduced by me in Germany in 1930 (Arch. f. Psychiat.92:474, 1930; Nervenarzt, 1930, p. 594; Bing: Lehrbuch der Nervenkrankheiten, ed. 4, 1932, p. 8) and has been since widely used in Europe. This small instrument has proved during these eight years to be of such definite value that it has become, like the reflex hammer, an indispensable part of the outfit for everyday neurologic practice.In testing the sensibility of the skin to pain, both for the first gross orientation and for exact determination of the boundaries of hypalgesia or analgesia, it is essential to apply on an extensive area of the skin a series of stimuli which should be as much as possible equal with regard to time, distance and strength. Ordinarily a pin
Wartenberg R. A PINWHEEL FOR NEUROLOGIC EXAMINATION. JAMA. 1937;109(16):1294. doi:10.1001/jama.1937.02780420054022