Thumbnail Stimulator

 
 

The Thumbnail Stimulator was originally conceived and built by Richard H. Gracely, Ph.D. (National Institute of Dental and Craniofacial Research, NIH, Bethesda, MD, and Georgetown Chronic Pain and Fatigue Research Center, Georgetown University, Washington, D.C.).  Minor modifications to the original have been made, specifically

 

About the Thumbnail Stimulator