The vibration source position in this study (a) on the index finger Download Scientific Diagram Understanding How to Best Transform Speech into Tactile Vibrations Could Benefit Hearing Impaired People Georgetown University Medical Center Georgetown University Hand Arm Vibration Syndrome Causes and Prevention NASP Finger Numbness and Tingling (Median Nerve Mobilization) 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 ToolBox Talk #42: HAND ARM VIBRATION SYNDROME (HAVS) As the majority of our operations involves working with our hands in some capacity whether it is hitting a hammer, using power tools,