JMS Pearce  East Yorks, England   Wilhelm Heinrich Erb. By F. Langbein & Cie. Heidelberg. 1897. Universitätsbibliothek Heidelberg. Via Wikimedia. CC BY-SA 4.0 Reflex hammers are the icon or hallmark of every neurologist. How important are the reflexes they elicit? What is their mechanism? The advent of modern technology has made it easy to forget…