The acupoint on the back of the thumb is LI4 (Large Intestine 4), also known as Hegu, located on the fleshy web between the base of the thumb and index finger, and Mechanix Wear X Large Black M Pact Full Finger Spandex And Rubber Anti Vibration Gloves With Hook & Loop Cuff Poron SRD Foam Palm And Rubberized Grip On Thumb, Index Finger And Palm : Amazon.in: Noninformative Vision Causes Adaptive Changes in Tactile Sensitivity Journal of Neuroscience Finger twitching LOOKEE O2Ring Continuous Ring Oximeter Overnight Track Oxygen Level & Heart Rate with Vibration Alert on Finger Vibration perception thresholds in the finger pulp of the little finger Download Scientific Diagram