1. (Reflex) hammer time! A thread. 🔨 #neurotwitter #Neurology #histmed @MayoClinicNeuro @mayoneurores @AANMember 
2. After Erb & Westphal described muscle stretch reflexes in 1875, chest percussion hammers were used to elicit reflexes. This is a Vernon percussion hammer, the precursor of the Queen Square reflex hammer. This one was made by Whitelaw (Aberdeen, Scotland).
3. This Wintrich percussion hammer was modified to allow sensation testing and so was likely used to check reflexes.
4. Taylor reflex hammer by Betz (Philadelphia)
5. Silas Weir Mitchell using a Taylor hammer (photo credit NLM)
6. Taylor reflex hammer, Lanska edition, by MDF Instruments (USA)
7. Dejerine reflex hammer by Thackray (Leeds)
8. Trömner reflex hammer by V. Mueller (Germany)
9. Babinski reflex hammer by Eschmann (England)
10. Rabiner reflex hammer
11. Queen Square reflex hammer by Bell & Croyden
12. (Big) Queen Square reflex hammer by Big Tendon Hammers (Australia)
13. Buck reflex hammer
14. McGill reflex hammer by Hevesy Surgical (Montreal)
15 (last). Link to @AANMember Neurology Minute on the history of reflex hammers neurologyminute.libsyn.com/website/neurol…
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