Four Forms of Arm Support (IMAGE) University of Utah Caption This illustration shows the four forms of hand support that were tested in a study of the Active Handrest, a device developed by University of Utah mechanical engineers as a way to let surgeons, artists, machinists and others use their scalpels, paint brushes and other tools over a wider work area that normally possible. During a test that involved tracing different size circles, people using the Active Handrest (bottom) had 36 percent fewer drawing errors than people using no arm support (top) and had 26 percent fewer drawing errors than people using a non-moving handrest. Credit University of Utah. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.